Regensburg 2010 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 9: Crystallization and Self Assembly II
CPP 9.1: Vortrag
Montag, 22. März 2010, 14:00–14:15, H48
A multi relaxation time lattice Boltzmann model for amphiphilic fluid mixtures — •Sebastian Schmieschek1 and Jens Harting2,1 — 1ICP Univ Stuttgart, Pfaffenwaldring 27, 70569 Stuttgart, Germany — 2MTP, Dept Appl Phys, TU Eindhoven, P.O.B. 513, 5600 MB Eindhoven, The Netherlands
Due to its inherent mesoscopic character and ease of implementation and parallelisation, the lattice Boltzmann method (LBM) has become a popular model for simulations of soft matter systems. However, the broadly used single relaxation time schemes suffer from restrictions, such as a fixed Prandtl number and limited numerical stability. The introduction of a multiple relaxation time model allows a differentiated treatment of the modelled physical properties overcoming part of these problems. The present work integrates a multi relaxation time (MRT) scheme to an implementation of the popular Shan Chen type LBM. The code allows the simulation of binary and ternary multicomponent systems, containing (im)miscible and optionally amphiphilic fluid species. It has been applied to study various problems like the rheology of mesophases and microemulsions or multiphase flows in microfluidic systems. Exemplary simulations of amphiphilic mixtures and basic benchmark results of the MRT scheme are presented.