Dresden 2011 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 19: Poster: Interfaces and Thin Films

CPP 19.23: Poster

Dienstag, 15. März 2011, 18:00–20:00, P2

Mesoscopic simulation of multiphase fluid dynamics: interfacial phenomena at pore scale — •Marta S. de La Lama, Stephan Herminghaus, and Martin Brinkmann — Max-Planck-Institute for Dynamics and Self-Organization, Göttingen, Germany

The wide range of length scales involved in multiphase flow points to mesoscale algorithms that capture the relevant physics and coarse-grain the irrelevant atomistic details. The term Multiparticle Collision Dynamics (MPC) comprises a variety of particle-based algorithms which employ successive free-streaming and local multi-particle collision steps [1]. Such collisions are carried out by performing rotations of particle velocities in predetermined cells in a manner that conserves mass, momentum and energy.

The algorithm can be adapted for modeling of multicomponent mixtures [2], and we employ it to analyze interfacial phenomena at pore scale. For instance, we can vary the wetting conditions in slit-pores or observe the effect of heterogeneous wettability on capillary imbibition. Furthermore, MPC is well-suited for complex geometries and, on the other hand, it accounts for thermal fluctuations. This gives us the chance of dealing with more realistic systems. For instance, we analyze how capillary bridges may affect the flow in poly-disperse mesoscopic porous media, what could help to elucidate and optimize the underlying mechanisms that take place in oil-reservoirs and filter materials.

References: [1] G. Gompper et al. ,Adv. Polym. Sci. 221 ,1 (2009) [2] Y. Inoue et al. ,J. Comp. Phys. 201 ,191 (2004)