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RUB, Marquardapl. Prof. Dr. Fathollah Varnik
ICAMS
Ruhr-Universität Bochum
IC 02-505
Universitätsstr. 150
44801 Bochum
Tel.: +49 234 32 29194
E-Mail: fathollah.varnik@rub.de
Research
Pulsatile flow within an aneurysm for different vessel wall elasticity as indicated. Strongest flow occurs for the case of a soft (degraded) tissue on the right.
ICAMS 2023
Current research interests of Fathollah Varnik cover a broad range including molecular scale problems and phenomena on the mesoscopic scale. Some examples are given below.
Molecular Dynamics:- Additive effects on shape memory behavior in polymers
- Role of heterogeneity for shear banding in metallic glasses.
- Effects of deep thermal cycling on ductility in metallic glasses
- Structure formation in metallic foams
- Dendritic growth in the presence of convection
- Flow and stresses in cerebral aneurysma
- Pressure-stress phase shift in blood flow through flexible arteries
Competences
- Dynamics of free surfaces, droplets and multi-component fluids
- Lattice Boltzmann modeling
- Convection-diffusion in micro-channels
- Non-linear rheology of disordered systems
- R. Namdar, M. Khodsiani, H. Safari, T. Neeraj, et al.
Numerical study of convective heat transfer in static arrangements of particles with arbitrary shapes: A monolithic hybrid lattice Boltzmann-finite difference-phase field solver. Particuology, 85, 186-197, (2024) - M. Khodsiani, R. Namdar, F. Varnik, F. Beyrau, B. Fond
Spatially resolved investigation of flame particle interaction in a two dimensional model packed bed. Particuology, 85, 167-185, (2024) - T. Neeraj, C. Velten, G. Janiga, K. Zähringer, et al.
Modeling gas flows in packed beds with the Lattice Boltzmann method: Validation against experiments. Flow, Turbulence and Combustion, 111, 463-491, (2023) - A. Lagogianni, F. Varnik
Temperature rise inside shear bands in a simple model glass. International Journal of Molecular Sciences, 23, 12159, (2022) - M. Bruns, F. Varnik
Enhanced dynamics in deep thermal cycling of a model glass. The Journal of Chemical Physics, 156, 234501, (2022) - H. Wang, K. Uhlmann, V. Vedula, D. Balzani, F. Varnik
Fluid-structure interaction simulation of tissue degradation and its effects on intra-aneurysm hemodynamics. Biomechanics and Modeling in Mechanobiology, 21, 671–683, (2022) - M. Bruns, F. Varnik
Rejuvenation in deep thermal cycling of a generic model glass: a study of per-particle energy distribution. Materials, 15, 829, (2022) - H. Wang, D. Balzani, V. Vedula, K. Uhlmann, F. Varnik
On the potential self-amplification of aneurysms due to tissue degradation and blood flow revealed from FSI simulations. Frontiers in Physiology, 12, 785780, (2021) - H. Wang, T. Krüger, F. Varnik
Geometry and flow properties affect the phase shift between pressure and shear stress waves in blood vessels. Fluids, 6, 378, (2021) - M. Bruns, M. Hassani, F. Varnik, A. Hassanpour, et al.
Decelerated aging in metallic glasses by low temperature thermal cycling. Physical Review Research, 3, 013234, (2021) - H. Dumlu, A. Marquardt, E. Mahmoudinezhad Zirdehi, F. Varnik, et al.
A mechanical analysis of chemically stimulated linear shape memory polymer actuation. Materials, 14, 481, (2021) - E. Mahmoudinezhad Zirdehi, H. Dumlu, G. Eggeler, F. Varnik
On the size effect of additives in amorphous shape memory polymers. Materials, 14, 327, (2021) - S. Vakili, I. Steinbach, F. Varnik
Multi‑phase‑field simulation of microstructure evolution in metallic foams. Scientific Reports, 10, 19987, (2020) - R. Schiedung, M. Tegeler, D. Medvedev, F. Varnik
Simulation of capillary-driven kinetics with multi-phase-field and lattice Boltzmann method. Modelling and Simulation in Materials Science and Engineering, 28, 065008, (2020) - E. Mahmoudinezhad Zirdehi, T. Voigtmann, F. Varnik
Multiple character of non-monotonic size-dependence for relaxation dynamics in polymer-particle and binary mixtures. Journal of Physics - Condensed Matter, 32, 275104, (2020) - H. Wang, T. Krüger, F. Varnik
Effects of size and elasticity on the relation between flow velocity and wall shear stress in side-wall aneurysms: A lattice Boltzmann-based computer simulation study. PLOS ONE, 15, e0227770, (2020) - M. Hassani, M. Bruns, F. Varnik
A crossover in spatio-temporal correlations of strain fluctuations in glass forming liquids. Journal of Statistical Mechanics: Theory and Experiment (JSTAT), 2020, 014002, (2020) - M. Hassani, A. Lagogianni, F. Varnik
Probing the degree of heterogeneity within a shear band of a model glass. Physical Review Letters, 123, 195502, (2019) - E. Mahmoudinezhad Zirdehi, F. Varnik
Non-monotonic effect of additive particle size on the glass transition in polymers. The Journal of Chemical Physics, 150, 024903, (2019) - M. Hassani, E. Mahmoudinezhad Zirdehi, K. Krok, P. Schall, et al.
Long-range strain correlations in 3D quiescent glass forming liquids. Europhysics Letters, 124, 18003, (2018) - E. Ghobadi, A. Marquardt, E. Mahmoudinezhad Zirdehi, K. Neuking, et al.
The influence of water and solvent uptake on functional properties of shape-memory polymers. International Journal of Polymer Science, 2018, 7819353, (2018) - M. Gross, F. Varnik
Shear-density coupling for a compressible single-component yield-stress fluid. Soft Matter, 14, 4577-4590, (2018) - E. Ghobadi, A. Marquardt, E. Zirdehi, K. Neuking, et al.
The influence of water and solvent uptake on functional properties of shape-memory polymers. International Journal of Polymer Science, 2018, 7819353, (2018) - M. Hassani, P. Engels, F. Varnik
Wall effects on spatial correlations of non-affine strain in a 3D model glass. EPL Journal, 121, 18005, (2018) - R. Schiedung, I. Steinbach, F. Varnik
Multi-phase-field method for surface tension induced elasticity. Physical Review B, 97, 035410, (2018) - M. Tegeler, A. Monas, O. Shchyglo, I. Steinbach, F. Varnik
Effect of microstructure during dendritic solidification on melt flow: A phase-field lattice-Boltzmann study. Proceedings of the 6th Decennial International Conference on Solidification Processing, (2017) - R. Schiedung, R. Darvishi Kamachali, I. Steinbach, F. Varnik
Multi-phase-field model for surface and phase-boundary diffusion. Physical Review E, 96, 012801, (2017) - S. Vakili, I. Steinbach, F. Varnik
On the numerical evaluation of local curvature for diffuse interface models of microstructure evolution. Procedia Computer Science, 108, 1852-1862, (2017) - E. Mahmoudinezhad Zirdehi, A. Marquardt, G. Eggeler, F. Varnik
Molecular dynamics simulations of entangled polymers: The effect of small molecules on the glass transition temperature. Procedia Computer Science, 108, 265-271, (2017) - M. Hassani, P. Engels, D. Raabe, F. Varnik
Localized plastic deformation in a model metallic glass: A survey of free volume and local force distributions. Journal of Statistical Mechanics: Theory and Experiment, 2016, 084006, (2016) - , I. Steinbach, F. Varnik
Modeling the flow in diffuse interface methods of solidification. Physical Review E, 92, 023303, (2015) - Nima H. Siboni, D. Raabe, F. Varnik
Aging in amorphous solids: A study of the first-passage time and persistence time distribution. Europhysics Letters, 111, 48004, (2015) - D. Belardinelli, M. Sbragaglia, L. Biferale, M. Gross, F. Varnik
Fluctuating multicomponent lattice Boltzmann model. Physical Review E, 91, 023313, (2015) - S. Ayodele, D. Raabe, F. Varnik
Shear-flow-controlled mode selection in a nonlinear autocatalytic medium. Physical Review E, 91, 022913, (2015) - M. Gross, T. Krüger, F. Varnik
Fluctuations and diffusion in sheared athermal suspensions of deformable particles. Europhysics Letters, 108, 68006, (2015) - F. Farahpour, M. Ejtehadi, F. Varnik
Polyelectrolytes polarization in nonuniform electric fields. International Journal of Modern Physics C, 25, 1 - 9, (2014) - S. Mandal, S. Lang, M. Gross, M. Oettel, et al.
Multiple reentrant glass transitions in confined hard-sphere glasses. Nature Communications, 5, 4435, (2014) - F. Varnik, S. Mandal, V. Chikkadi, D. Denisov, et al.
Correlations of plasticity in sheared glasses. Physical Review E, 89, 1 - 6, (2014) - M. Gross, T. Krüger, F. Varnik
Rheology of dense suspensions of elastic capsules: normal stresses, yield stress, jamming and confinement effects. Soft Matter, 10, 4360-4372, (2014) - T. Krüger, M. Gross, D. Raabe, F. Varnik
Crossover from tumbling to tank-treading-like motion in dense simulated suspensions of red blood cells. Soft Matter, 9, 9008-9015, (2013) - S. Mandal, V. Chikkadi, B. Nienhuis, D. Raabe, et al.
Single-particle fluctuations and directional correlations in driven hard-sphere glasses. Physical Review E, 88, 022129, (2013) - M. Gross, I. Steinbach, D. Raabe, F. Varnik
Viscous coalescence of droplets: a lattice Boltzmann study. Physics of Fluids, 25, 052101, (2013) - D. Medvedev, F. Varnik, I. Steinbach
Simulating mobile dendrites in a flow. Procedia Computer Science, 18, 2512-2520, (2013) - F. Varnik, A. Rios Nogues, M. Gross, I. Steinbach
Simulation of viscous sintering using the lattice Boltzmann method. Modelling and Simulation in Materials Science and Engineering, 21, 025003, (2013) - N. H. Siboni, D. Raabe, F. Varnik
Maintaining the equipartition theorem in small heterogeneous molecular dynamics ensembles. Physical Review E, 87, 030101, (2013) - M. Gross, F. Varnik
Interfacial roughening in non-ideal fluids: dynamic scaling in the weak- and strong-damping regime. Physical Review E, 87, 022407, (2013) - S. Mandal, M. Gross, D. Raabe, F. Varnik
Flow heterogeneity and correlations in a sheared hard sphere glass: insight from computer simulations. 4th International Symposium on Slow Dynamics in Complex Systems: Keep Going Tohoku. AIP Conference Proceedings, 1518, 266-271, (2013) - F. Farahpour, A. Maleknejad, F. Varnik, M. Ejtehadi
Chain deformation in translocation phenomena. Soft Matter, 9, 2750-2759, (2013) - M. Gross, F. Varnik
Critical dynamics of an isothermal compressible nonideal fluid. Physical Review E, 86, 061119, (2012) - V. Chikkadi, S. Mandal, B. Nienhuis, D. Raabe, et al.
Shear-induced anisotropic decay of correlations in hard-sphere colloidal glasses. EPL Journal, 100, 56001, (2012) - M. Gross, F. Varnik
Spreading dynamics of nanodrops: A lattice Boltzmann study. International Journal of Modern Physics C, 25, 7, (2012) - M. Gross, F. Varnik
Simulation of static critical phenomena in nonideal fluids with the Lattice Boltzmann method. Physical Review E, 85, 056707, (2012) - S. Mandal, M. Gross, D. Raabe, F. Varnik
Heterogeneous shear in hard sphere glasses. Physical Review Letters, 108, 098301, (2012) - N. Moradi, F. Varnik, I. Steinbach
Contact angle dependence of the velocity of sliding cylindrical drop on flat substrates. Europhysics Letters, 95, 44003, (2011) - M. Gross, R. Adhikari, M. Cates, F. Varnik
Modelling thermal fluctuations in non-ideal fluids with the lattice Boltzmann method. Philosophical Transactions of The Royal Society A, 13, 2274–2282, (2011) - T. Krüger, F. Varnik, D. Raabe
Particle stress in suspensions of soft objects. Philosophical Transactions of The Royal Society A, 13, 2414-2421, (2011) - N. Moradi, M. Gross, F. Varnik, G. Zikos, I. Steinbach
Morphologies of small droplets on patterned hydrophobic substrates. Modelling and Simulation in Materials Science and Engineering, 19, 45005, (2011) - P. Müller-Buschbaum, D. Magerl, R. Hengstler, J.-F. Moulin, et al.
Structure and flow of droplets on solid surfaces. Journal of Physics: Condensed Matter, 23, 184111, (2011) - F. Varnik, M. Gross, N. Moradi, G. Zikos, et al.
Stability and dynamics of droplets on patterned substrates: insights from experiments and lattice Boltzmann simulations. Journal of Physics: Condensed Matter, 23, 184112, (2011) - P. Uhlmann, F. Varnik, P. Truman, G. Zikos, et al.
Microfluidic emulsion separation-simultaneous separation and sensing by multilayer nanofilm structures. Journal of Physics: Condensed Matter, 23, 184123, (2011) - M. Gross, M. Cates, F. Varnik, R. Adhikari
Langevin theory of fluctuations in the discrete Boltzmann equation. Journal of Statistical Mechanics: Theory and Experiment, 03, 1742-5468, (2011) - M. Gross, N. Moradi, G. Zikos, F. Varnik
Shear stress in nonideal fluid lattice Boltzmann simulations. Physical Review E, 83, 17701, (2011) - S. Ayodele, F. Varnik, D. Raabe
Lattice Boltzmann study of pattern formation in reaction-diffusion systems. Physical Review E, 83, 14, (2011) - M. Gross, R. Adhikari, M. Cates, F. Varnik
Thermal fluctuations in the lattice Boltzmann method for nonideal fluids. Physical Review E, 82, 056714, (2010) - T. Krüger, F. Varnik, D. Raabe
Second-order convergence of the deviatoric stress tensor in the standard Bhatnagar-Gross-Krook lattice Boltzmann method. Physical Review E, 82, 025701, (2010) - M. Gross, F. Varnik, D. Raabe, I. Steinbach
Small droplets on superhydrophobic substrates. Physical Review E, 81, 051606, (2010) - N. Moradi, F. Varnik, I. Steinbach
Roughness-gradient-induced spontaneous motion of droplets on hydrophobic surfaces: A lattice Boltzmann study. Europhysics Letters, 89, 26006, (2010) - S. Ayodele, F. Varnik, D. Raabe
Transverse diffusive mixing of solutes in pressure driven microchannels: a Lattice Boltzmann study of the scaling laws. La Houille Blanche, International Water Journal, 6, 93 - 100, (2009) - M. Gross, F. Varnik, D. Raabe
Fall and rise of small droplets on rough hydrophobic substrates. Europhysics Letters, 88, 26002, 1-6, (2009) - F. Varnik, K. Binder
Multiscale modelling of polymers at interfaces. International Journal of Materials Research, 100, 1494-1502, (2009) - F. Varnik, D. Raabe
Profile blunting and flow blockage in a yield stress fluid: A molecular dynamics study. Physical Review E, 77, 011504, 1-9, (2008) - F. Varnik, P. Truman, B. Wu, P. Uhlmann, et al.
Wetting gradient induced separation of emulsions: A combined experimental and lattice Boltzmann computer simulation study. Physics of Fluids, 20, 072104, 1-14, (2008) - F. Varnik, D. Raabe
Can microscale wall roughness trigger unsteady/chaotic flows?. American Institute of Physics, 5th International Workshop on Complex Systems, 982, 626-632, (2008) - F. Varnik
Diffusion, structural relaxation and rheological properties of a simple glass forming model : A molecular dynamics study. 5th International Workshop on Complex Systems, American Institute of Physics, 982, 160-168, (2007) - F. Varnik, D. Raabe
Chaotic flows in microchannels : A lattice Boltzmann study. Molecular Simulation , 33, 583-587, (2007) - F. Varnik, D. Dorner, D. Raabe
Roughness-induced flow instability : A lattice Boltzmann study. Journal of Fluid Mechanics , 573, 191, (2007) - F. Varnik, D. Raabe
Scaling effects in microscale fluid flow at rough solid surfaces. Modelling and Simulation in Materials Science and Engineering, 14, 857, (2006) - F. Varnik
Structural relaxation and rheological response of a driven amorphous system. Journal of Chemical Physics, 125, 164514, (2006) - F. Varnik, D. Raabe
Microscale fluid flow at rough metallic surfaces : A lattice Boltzmann study. Proceedings of 2006 ASME Pressure Vessels and Piping Division Conference, PVP2006-ICPVT11, (2006) - F. Varnik, O. Henrich
Yield stress discontinuity in a simple glass. Physical Review B , 73, 174209, (2006) - O. Henrich, F. Varnik, M. Fuchs
Dynamic yield stresses of glasses : asymptotic formulae. Journal of Physics: Condensed Matter, 17, 1, (2005) - J. Baschnagel, F. Varnik
Computer simulations of supercooled polymer melts in the bulk and in confined geometry. Journal of Physics: Condensed Matter, 17, R851, (2005) - K. Binder, J. Horbach, W. Kob, W. Paul, F. Varnik
Molecular dynamics simulations. Journal of Physics: Condensed Matter, 16, S429 -S453, (2004) - F. Varnik, L. Bocquet, L.-J. Barrat
A study of the static yield stress in a binary Lennard-Jones glass. Journal of Chemical Physics, 120, 2788, (2004) - F. Varnik, L. Bocquet, L.-J. Barrat
Stress fluctuations, static yield stress and shear banding in a flowing Lennard-Jones glass. SPIE proceedings on Fluctuation and Noise in Materials, 5469, 209, (2004) - J. Baschnagel, H. Meyer, F. Varnik, S. Metzger, et al.
Computer simulations of polymers close to solid interfaces : Some selected topics. Interface Science : Polymers at Interfaces, 11, 159-173 , (2003) - K. Binder, J. Horbach, W. Kob, F. Varnik
Atomistic Simulation of Transport Phenomena in Simple and Complex Fluids and Fluid Mixtures. Interface and Transport Dynamics, 32, 226-248, (2003) - F. Varnik, J. Baschnagel, K. Binder, M. Mareschal
Confinement effects on the slow dynamics of a supercooled polymer melt: Rouse modes and the incoherent scattering function. The European Physical Journal E , 12, 167, (2003) - F. Varnik, L. Bocquet, L.-J. Barrat, L. Berthier
Shear localization in a model glass. Physical Review Letters, 90, 095702 , (2003) - F. Varnik, J. Baschnagel, K. Binder
Glassy dynamics in thin polymer films : Recent MD results. Journal of Non-Crystalline Solids , 307-310, 524, (2002) - F. Varnik
Simulation of planar systems at constant normal pressure : Is it also possible to keep the plate separation constant?. Computer Physics Communications, 149, 61, (2002) - F. Varnik, J. Baschnagel, K. Binder
Reduction of the glass transition temperature in polymer films : A molecular dynamics study. Physical Review E, 65, 021507 , (2002) - F. Varnik, K. Binder
Shear viscosity of a supercooled polymer melt via non equilibrium molecular dynamics simulations. Journal of Chemical Physics, 117, 6336 , (2002) - J. Buchholz, W. Paul, F. Varnik, K. Binder
Cooling rate dependence of the glass transition temperature of polymer melts : a Molecular Dynamics study. Journal of Chemical Physics, 117, 7364, (2002) - F. Varnik, J. Baschnagel, K. Binder
Glass transition in thin polymer films : A molecular dynamics study. International Journal of Modern Physics C, 13, 799 , (2002) - F. Varnik, J. Baschnagel, K. Binder
Static and dynamic properties of supercooled thin polymer films. The European Physical Journal E , 8, 175, (2002) - F. Varnik, P. Scheidler, J. Baschnagel, W. Kob, K. Binder
Molecular dynamics simulation of confined glass forming liquids. Materials Research Society Symposium Proceedings, 651, T3.1.1-T3.1.6, (2001) - F. Varnik, J. Baschnagel, K. Binder
Molecular dynamics of supercooled polymer films. Journal de Physique IV France, 10, 239-242, (2000) - F. Varnik, J. Baschnagel, K. Binder
Molecular dynamics results on the pressure tensor of polymer films. Journal of Chemical Physics, 113, 4444-4453, (2000) - R. Mästle, C. Schmitz, F. Varnik, A. Giesen
Instruments and standard measurement procedures for laser beam characterization. Proceedings of 5-th Conference on Optics (ROMOPTO’97), 3405, 978, (1997) - F. Varnik, R. Mästle, A. Giesen
Measurement of moments for diffracted beams : Comparison with theory. Proceedings of 4th international workshop on Laser Beam and Optics Characterization (LBOC), (1997)
- 04.12.2022
Fathollah Varnik
Chemically triggered shape memory polymers: molecular modelling and experiments invited
Advanced Materials Discussion Series at Shiraz University, Iran - 03.10.2022
Fathollah Varnik, Hakan Dumlu, Elias Mahmoudinezhad Zirdehi, Gunther Eggeler
Effects of additive molecules on shape memory effect in polymers: a combined experimental and computer simulation study invited
Tenth Multiscale Materials Modelling Conference (MMM10) 2022, Baltimore, Maryland, USA - 14.09.2021
Reza Namdar, Hesameddin Safari, Seyed Ali Hosseini, Dominique Thévin, Fathollah Varnik
Lattice Boltzmann simulations of reacting flows in small-scale static and moving beds of particles with complex shapes
CRC-TRR 287 Workshop 2022, Hannover, Germany - 24.03.2021
Fathollah Varnik
Decelerated aging in metallic glasses by low temperature thermal cycling
Online-Tagung der Deutschen Physikalischen Gesellschaft - 15.01.2020
Fathollah Varnik, Gunther Eggeler
Chemo-mechanical and chemo-thermal coupling in shape memory polymers: how computer simulations meet experiments
2020 Online-Conference WCCM-ECCOMAS 2020 (originally planned for Paris), online - 13.09.2019
Fathollah Varnik
Modelling shape memory polymers: from molecular understanding towards engineering applications invited
Covestro Deutschland AG, Leverkusen, Germany - 25.06.2018
Muhammad Hassani, Fathollah Varnik
Correlation of strain fluctuations in 3D glass and supercooled liquid
10 Years ICAMS - International Symposium, Ruhr-Universität Bochum, Germany - 25.06.2018
Elias Mahmoudinezhad Zirdehi, Fathollah Varnik
Shape-memory effect in polymers containing small molecules
10 Years ICAMS - International Symposium, Ruhr-Universität Bochum, Germany - 25.06.2018
Samad Vakili, Fathollah Varnik
Phase-field Lattice-Boltzmann simulation of complex fluids
10 Years ICAMS - International Symposium, Ruhr-Universität Bochum, Germany - 13.06.2018
Samad Vakili, Ingo Steinbach, Fathollah Varnik
On the numerical evaluation of local curvature for diffuse interface models of microstructure evolution
International Conference on Computational Science, 2017, Zürich, Switzerland - 22.09.2017
Raphael Schiedung, Marvin Tegeler, Fathollah Varnik
Effect of solubility and capillarity driven kinetics on sintered microstructure of WC-Co alloys
EUROMAT 2017, Thessaloniki, Greece - 26.07.2017
Alexander Monas, Oleg Shchyglo, Fathollah Varnik, Ingo Steinbach
Effect of melt flow on dendritic solidification: A phase-field study
6th Decennial International Conference on Solidification Processing, Beaumont Estate, Old Windsor, UK - 22.03.2017
Fathollah Varnik
Plastic deformation in amorphous solids: The role of elasticity and spatio-temporal correlations of fluctuations invited
DPG Spring Meeting, Dresden, Germany - 20.03.2017
Raphael Schiedung, Reza Darvishi Kamachali, Ingo Steinbach, Fathollah Varnik
Curvature induced stress and phase-boundary diffusion
DPG Spring Meeting, Dresden, Germany - 16.02.2017
Fathollah Varnik
Shear localization in amorphous solids: The role of structure and long range spatio-temporal correlations of fluctuations invited
Bridging the Scales in Glasses II, University of Mainz, Mainz, Germany - 16.01.2017
Fathollah Varnik
Jamming and shear driven fluctuations in suspensions of non-Brownian deformable particles invited
Theoriekolloquium, Department of Physics, University of Konstanz, Germany - 09.10.2016
Muhammad Hassani, Fathollah Varnik
Shear banding in amorphous solids: The role of heterogeneity in structure and force distribution
8th International Conference on Multiscale Materials Modeling, Dijon, France - 28.09.2016
Elias Mahmoudinezhad Zirdehi, Fathollah Varnik
Chemo-mechanical coupling in shape memory polymers: Theory versus experiment
MSE 2016: Materials Science and Engineering Congress, Darmstadt, Germany - 26.09.2016
Muhammad Hassani, Dierk Raabe, Fathollah Varnik
From glass to supercooled liquid: Long-range correlation of shear strain persists
3rd International Workshop on Nonlinear Response in Complex Matter, Primošten, Croatia - 27.09.2016
Fathollah Varnik
The role of stress and structure fluctuations for plastic response
3rd International Workshop on Nonlinear Response in Complex Matter, Primošten, Croatia - 20.06.2016
Muhammad Hassani, Dierk Raabe, Fathollah Varnik
Plasticity in amorphous solids: Local heterogeneity and localization of plastic deformations
Workshop on Hybrid Simulation Methods in Fluid Dynamics: Models, Software and Application, Garching, Germany - 08.06.2016
Fathollah Varnik
Viscosity, yield stress and shear-induced diffusion in dense suspensions of non-Brownian deformable particles invited
Faculty of Physics, Technical University of Dortmund, Germany. - 30.05.2016
Fathollah Varnik
Scale bridging modelling of complex fluids: From nano-scale flow to suspension rheology
Materials Chain International Conference 2016, Bochum, Germany - 07.03.2016
Fathollah Varnik
Flow and its fluctuations in dense particulate suspensions: From molecular dynamics towards a hydrodynamic theory invited
Flowing Matter - COST Action MP1305, Lecce, Italy - 11.11.2015
Fathollah Varnik
Fluctuating non-ideal fluid lattice Boltzmann method: a route to bridge the gap between nano- and mesoscale modeling of fluids invited
Institute of Mathematics, University of Düsseldorf, Germany - 13.10.2015
Fathollah Varnik
Plasticity in amorphous solids: how far are we from a predictive theory? invited
Colloquium Talk, Institute of Material Physics, University of Münster - 24.09.2015
Amol Subhedar, Fathollah Varnik, Ingo Steinbach
Modelling the flow in diffuse interface methods of solidification
Euromat 2015, Warsaw, Poland - 22.09.2015
Fathollah Varnik
Rheology, diffusion and correlations in dense suspensions of deformable particles invited
Particle Simulations 2015, Erlangen, Germany - 05.05.2015
Muhammad Hassani, Dierk Raabe, Fathollah Varnik
Sensitivity of the correlation plastic rearrangements to the microscopic dynamics in sheared disordered solids
International Workshop on Dynamics in Viscous Liquids, Montpellier, France - 05.05.2015
Fathollah Varnik, Dierk Raabe
Non-locality of effective temperature in a shear driven model glass
International Workshop on Dynamics in Viscous Liquids, Montpellier, France - 05.05.2015
Fathollah Varnik
Non monotonic effect of confinement on the structure and dynamics of hard sphere colloids invited
Kinetik Seminar, University of Bayreuth, Germany - 04.05.2015
Fathollah Varnik
Correlation of motion and diffusion in sheared athermal suspensions of deformable particles
International Workshop on Dynamics in Viscous Liquids, Montpellier, France - 07.07.2014
Fathollah Varnik
Relating shear-induced diffusion to the rheology of dense suspensions of model red blood cells invited
Institute for Theoretical Physics II, University of Düsseldorf - 27.05.2014
Fathollah Varnik
Rheology and diffusion in athermal suspensions of deformable particles invited
Institute of Physics, University of Mainz - 20.05.2014
Fathollah Varnik
Microscopic mechanisms governing rheology and shear-induced diffusion in suspensions of red blood cells invited
CNRS - Solvay, Lyon, France - 08.03.2014
Fathollah Varnik
The fluctuating non-ideal fluid lattice Boltzmann method: theory and application invited
5th International Conference on Nanostructures, Kish Island, Iran - 05.12.2013
Fathollah Varnik
The fluctuating Lattice Boltzmann method for non-ideal fluids: Theory and application invited
City College, New York, USA - 04.12.2013
Fathollah Varnik
Bridging the gap between the nano-and mesoscales: The fl uctuating lattice Boltzmann method for non-ideal fluids invited
MRS Meeting 2013, Boston, USA - 27.11.2013
Ulrich Preiss, Fathollah Varnik
Morphology evolution during electrodeposition from ionic liquids: a scale-bridging approach
MPG-CPFS Conference, Dresden, Germany - 18.11.2013
Fathollah Varnik
The Lattice Boltzmann method and its applications in microstructure evolution
Sitzung des Fachausschusses Computersimulation der DGM, Methoden der Gefügesimulation, Ruhr-Universität Bochum, Bochum, Germany - 05.11.2013
Fathollah Varnik
Shear banding in amorphous solids
Materials Day 2013, Ruhr-Universität Bochum, Bochum, Germany - 23.10.2013
Fathollah Varnik
Complex dynamic behavior in the flow of sheared amorphous materials invited
Theorie Kolloquium und Hauptseminar Aktuelle Probleme der Theoretischen Physik, Universität Duisburg-Essen, Essen, Germany - 09.10.2013
Dhiraj Mahajan, Fathollah Varnik, Alexander Hartmaier
Effect of substrate topography on adhesion properties of polymer coatings invited
Sitzung DGM-Fachausschuss „Hybride Werkstoffe und Strukturen“, Kaiserslautern, Germany - 10.09.2013
Dhiraj Mahajan, Fathollah Varnik, Alexander Hartmaier
Surface roughness effect on static, dynamic and mechanical properties of polymers at interfaces
3rd International Conference on Material Modelling (ICMM), Warsaw, Poland - 26.07.2013
Dhiraj Mahajan, Fathollah Varnik, Alexander Hartmaier
Effect of substrate topography on adhesion properties of polymer coatings
7th International Discussion Meeting on Relaxation in Complex Systems, Barcelona, Spain - 21.07.2013
Fathollah Varnik
Dynamic yielding and non-linear rheology of a binary Lennard-Jones model invited
The 7th International Discussion Meeting on Relaxations in Complex Systems, Barcelona, Spain - 16.05.2013
Fathollah Varnik
Thermal fl uctuations in non-ideal fl uid Lattice Boltzmann simulations: Theory and applications invited
ERC School-Workshop Multiphase Physics at the micro- and nanoscales, University of Rome, Rome, Italy - 07.05.2013
Oleg Shchyglo, Markus Gross, Ingo Steinbach, Fathollah Varnik
Multiscale modelling of solidification phenomena: the coupled phase field-fluctuating lattice Boltzmann method
ICAMS² 2013, International Colloquium on Advanced Materials Simulation, Bochum, Germany - 06.05.2013
Dhiraj Mahajan, Anatoly Berezkin, Ulrich Biedermann, Fathollah Varnik, Alexander Hartmaier
Polymer/substrate interfaces: simulation of structure, properties and behaviour
ICAMS² 2013, International Colloquium on Advanced Materials Simulation, Bochum, Germany - 06.03.2013
Dmitry Medvedev, Oleg Shchyglo, Fathollah Varnik, Ingo Steinbach
Combined phase field - Lattice Boltzmann simulation of dendritic solidification with fluid flow and solid particle motion
TMS 2013, San Antonio, USA - 08.01.2013
Fathollah Varnik
Nonlinear rheology and heterogeneous flow in complex fluids invited
Institut for Theoretical Physics, University of Göttingen, Göttingen, Germany - 14.11.2012
Dhiraj Mahajan, Fathollah Varnik, Alexander Hartmaier
Effect of substrate topography on mechanical properties of glassy polymer coatings
ADGLASS Workshop 2012, Bremen, Germany - 18.10.2012
Dhiraj Mahajan, Fathollah Varnik, Alexander Hartmaier
Effect of surface roughness on cohesive bonding of polymer-solid interfaces
MMM 2012 - 6th International Conference on Multiscale Materials Modeling, Biopolis, Singapore - 10.10.2012
Fathollah Varnik, Suvendu Mandal, Markus Gross
Non-linear and heterogeneous response of glassy materials invited
National Symposium on Materials & Processing - 2012 (MAP-2012), Mumbai, India - 24.07.2012
Fathollah Varnik
New developments in lattice Boltzmann modelling of complex fluids: from surface roughening, critical phenomena to suspensions of red blood cells invited
21st International Conference on Discrete Simulation of Fluid Dynamics (DSFD), The LaLiT Ashok, Bangalore, India - 20.07.2012
Nima Hamidi Siboni, Dierk Raabe, Fathollah Varnik
Time evolution of elementary structural events in amorphous materials
Bridging the Scales in Glasses, Heinrich-Heine-Universität, Düsseldorf, Germany - 19.07.2012
Suvendu Mandal, Dierk Raabe, Fathollah Varnik
Reentrant glass transitions in confined hard-sphere glasses invited
Bridging the Scales in Glasses, Heinrich-Heine-Universität, Düsseldorf, Germany - 18.07.2012
Segun Ayodele, Dierk Raabe, Fathollah Varnik
Flow heterogeneity in hard-sphere glasses: connecting MD studies with lattice Boltzmann simulations invited
Bridging the Scales in Glasses, Heinrich-Heine-Universität, Düsseldorf, Germany - 30.03.2012
Markus Gross, Fathollah Varnik
Critical phenomena in an isothermal compressible fluid – a lattice Boltzmann study
DPG Spring Meeting 2012, Berlin, Germany - 29.03.2012
Markus Gross, Fathollah Varnik
Simulation of critical phenomena in fluids with the lattice Boltzmann method
DPG Spring Meeting 2012, Berlin, Germany - 28.03.2012
Nasrollah Moradi, Fathollah Varnik, Ingo Steinbach
Dynamics of small droplets on solid surfaces
DPG Spring Meeting 2012, Berlin, Germany - 27.03.2012
Suvendu Mandal, Dierk Raabe, Fathollah Varnik
Phase diagram of confined hard-sphere glasses
DPG Spring Meeting 2012, Berlin, Germany - 27.03.2012
Nima Hamidi Siboni, Dierk Raabe, Fathollah Varnik
Aging and elementary relaxation processes in amorphous solids
DPG Spring Meeting 2012, Berlin, Germany - 26.03.2012
Fathollah Varnik, Suvendu Mandal, Dierk Raabe
An interface dissipation phase-field model for electrochemistry
DPG Spring Meeting 2012, Berlin, Germany - 19.03.2012
Segun Ayodele, Dierk Raabe, Fathollah Varnik
Flow heterogeneity in hard-sphere glasses: the fluid dynamical model
The international discussion meeting: Statistical Mechanics: Interplay of Theory and Computer Simulations, Johannes Gutenberg-Universität, Mainz, Germany - 19.03.2012
Suvendu Mandal, Dierk Raabe, Fathollah Varnik
Reentrant glass transitions in confined hard-sphere glasses
The international discussion meeting: Statistical Mechanics: Interplay of Theory and Computer Simulations, Johannes Gutenberg-Universität, Mainz, Germany - 19.03.2012
Markus Gross, Fathollah Varnik
Critical dynamics of an isothermal non-ideal fluid
The international discussion meeting: Statistical Mechanics: Interplay of Theory and Computer Simulations, Johannes Gutenberg-Universität, Mainz, Germany - 08.01.2012
Fathollah Varnik
Die Magie der Lotusblume: Neue Materialen für den Alltag invited
Ringvorlesung "MATERIALS 4 U", Deutsches Bergbaumuseum, Bochum, Germany - 14.09.2011
Alfredo Rios Nogues, Markus Gross, Fathollah Varnik, Ingo Steinbach
Simulation of sintering process by combined phase-field and lattice Boltzmann simulation
EUROMAT 2011 - European Congress on Advanced Materials and Processes, Montpellier, France - 08.08.2011
Markus Gross, Fathollah Varnik
Study of critical fluctuations via a fluctuating lattice Boltzmann method for non-ideal fluids
20th International Conference on Discrete Simulation of Fluid Dynamics (DSFS 2011), Fargo, USA - 08.08.2011
Markus Gross, Ronojoy Adhikari, Mike Cates, Fathollah Varnik
A discrete Boltzmann route to thermal fluctuations in LB models for non-ideal fluids
20th International Conference on Discrete Simulation of Fluid Dynamics (DSFS 2011), Fargo, USA - 08.08.2011
Segun Ayodele, Fathollah Varnik, Dierk Raabe
Lattice Boltzmann study of pattern formation in a convective-reaction-diffusion model
20th International Conference on Discrete Simulation of Fluid Dynamics (DSFS 2011), Fargo, USA - 08.08.2011
Nasrollah Moradi, Fathollah Varnik, Ingo Steinbach
Dynamic of droplets on flat substrates: lattice Boltzmann method versus analytic models
20th International Conference on Discrete Simulation of Fluid Dynamics (DSFS 2011), Fargo, USA - 08.08.2011
Timm Krüger, Fathollah Varnik, Dierk Raabe
Collective phenomena in dense suspensions of red blood cells under shear fluctuations via a fluctuating lattice Boltzmann method for non-ideal fluids
20th International Conference on Discrete Simulation of Fluid Dynamics (DSFS 2011), Fargo, USA - 05.07.2011
Dmitry Medvedev, Georgios Zikos, Fathollah Varnik
Lattice Boltzmann simulations of foams invited
8th International Conference on Mesoscopic Methods in Engineering and Science (ICMMES) 2011, Lyon, France - 04.07.2011
Fathollah Varnik
Flow heterogeneity and correlations in a hard sphere model glass invited
CECAM Workshop on multiscale modelling of amorphous materials: from structure to mechanical properties, Dublin, Ireland - 14.02.2011
Fathollah Varnik
Theory and computer simulation of complex fluids invited
Multiscale fluid dynamics with the Lattice Boltzmann method, Lorentz Center, Leiden, Netherlands - 18.01.2011
Fathollah Varnik
Computer simulation of complex fluids: from droplets to soft glasses invited
University of Erlangen-Nürnberg, Erlangen, Germany - 10.03.2009
Fathollah Varnik, T. Krüger, D. Raabe
Simulating red blood cells: a combined lattice Boltzmann and immersed boundary approach
IWoM3 - International Workshop on Multiscale Materials Modelling, Berlin, Germany - 02.09.2009
Fathollah Varnik
Nano-confined polymer melts: purely geometric effects versus substrate structure invited
NCTAM - The 11th National Congress on Theoretical and Applied Mechanics, Sofia, Bulgaria - 30.08.2009
Fathollah Varnik, Ingo Steinbach, Markus Gross, D. Raabe
Fall and rise of droplets on rough hydrophobic substrates
PF09 - 2nd Symposium on Phase-Field Modelling in Material Science and Engineering, Rolduc Abbey, Kerkrade, Netherlands - 13.07.2009
Fathollah Varnik, Ingo Steinbach, D. Raabe, T. Krüger
Convergence behaviour of shear stress in the lattice Boltzmann method: analytical estimates versus numerical simulations
ICMMES 2009 - The Sixth International Conference for Mesoscopic Methods in Engineering and Science, Guangzhou, China - 13.07.2009
Fathollah Varnik, Ingo Steinbach, D. Raabe, T. Krüger
Hemorheology and statistical properties of blood
ICMMES 2009 - The Sixth International Conference for Mesoscopic Methods in Engineering and Science, Guangzhou, China - 13.07.2009
Fathollah Varnik, Ingo Steinbach, Markus Gross, D. Raabe
Analytic and lattice Boltzmann studies of droplets on patterned hydrophobic surfaces
ICMMES 2009 - The Sixth International Conference for Mesoscopic Methods in Engineering and Science, Guangzhou, China - 13.07.2009
Fathollah Varnik, Ingo Steinbach, D. Raabe, T. Krüger
Simulation of a dense suspension of deformable particles using the lattice Boltzmann method
ICMMES 2009 - The Sixth International Conference for Mesoscopic Methods in Engineering and Science, Guangzhou, China - 02.07.2009
Fathollah Varnik, Markus Gross
Superhydrophobicity and self-cleaning: behaviour of droplets as small as roughness scale and self-cleaning invited
Departement of Solid State Physics, Ulm University, Germany - 30.06.2009
Fathollah Varnik
The generic nature of finite size driven droplet evaporation: evidence from Lattice Boltzmann and analytic studies of a Cahn-Hilliard free energy model invited
Physics Department, Johannes Gutenberg-Universität, Mainz, Germany - 24.05.2009
Fathollah Varnik, Ingo Steinbach, Markus Gross, D. Raabe
Droplets on patterned hydrophobic surfaces: a lattice Boltzmann study
EUROTHERM - Seminar Nr. 84, Namur, Belgium - 24.05.2009
Fathollah Varnik, Ingo Steinbach, Markus Gross, D. Raabe
Superhydrophobicity: when droplet sizes are comparable to roughness scale
EUROTHERM - Seminar Nr. 84, Namur, Belgium - 26.03.2009
Fathollah Varnik, Markus Gross, Dierk Raabe, Ingo Steinbach
Lattic Boltzmann studies of finite size driven droplet evaporation and droplet dynamics
DPG Spring Meeting 2009, Dresden, Germany - 24.03.2009
Fathollah Varnik, Markus Gross, Dierk Raabe, Ingo Steinbach
Stability of small droplets on superhydrophobic surfaces
DPG Spring Meeting 2009, Dresden, Germany - 10.03.2009
Fathollah Varnik, Ingo Steinbach, Markus Gross, D. Raabe
Fascinating world of small droplets: how simple models may describe a rich phenomenology invited
IWoM3 - International Workshop on Multiscale Materials Modelling, Berlin, Germany - 10.03.2009
Fathollah Varnik, Ingo Steinbach, Markus Gross, D. Raabe
Stability and dynamics of droplets
IWoM3 - International Workshop on Multiscale Materials Modelling, Berlin, Germany - 09.03.2009
Fathollah Varnik
Polymers at metallic interfaces
Werkzeuge in Industrie und Wissenschaft - Modellierung/Simulation/Berechnung, ICAMS Advanced Discussion, Bochum, Germany - 26.01.2009
Fathollah Varnik
Thermodynamics of small droplets on hydrophobic substrates: Theory versus Lattice Boltzmann simulations
ICAMS, Ruhr-Universität Bochum, Germany - 08.12.2008
Fathollah Varnik
Polymer-metal interfaces: study of early stages of coating dynamics via mesoscopic computer simulations
ICAMS-Workshop - 25.11.2008
Ingo Steinbach, Fathollah Varnik, D. Raabe
Heterogeneous dynamics of a simple glass under shear
UCGP2008 - Unifying Concepts in Glass Physics IV, Kyoto, Japan - 28.11.2008
Fathollah Varnik, Ingo Steinbach, Dierk Raabe
Response of a driven model glass and the Stokes-Einstein relation
UCGP2008 - Unifying Concepts in Glass Physics IV, Kyoto, Japen - 18.09.2008
Fathollah Varnik, Markus Gross, Dierk Raabe
Stability of small droplets: Finite size driven instability and droplets on superhydrophobic substrates invited
TU München, Germany
Professional Experience
Since 2008
Research group leader at ICAMS
2006-2008
Head of the group Computer Simulation of Complex Fluids, Max-Planck Institute for Iron Research, Düsseldorf, Germany
2004-2006
Project leader, Max-Planck Institute for Iron Research, Düsseldorf, Germany
2002-2004
Postdoc, CECAM and ENS-Lyon, France
2001-2002
Postdoc, University of Mainz, Germany
Education
Dipl.-Phys., Physics, University of Cologne
PhD, Physics, Johannes Gutenberg Universität Mainz
apl. Prof. Dr., Physics, RWTH Aachen