Feasibility of the multi-particle collision dynamics method as a simulation technique for a magnetic particle suspension

Abstract

ABSTRACTWe have elucidated the feasibility of the multi-particle collision dynamics (MPCD) method as a technique for the simulation of a magnetic particle suspension, by addressing the dependence of the translational and rotational Brownian motion of the magnetic particles on the parameters that characterise a MPCD simulation. A reasonable level of activation of the Brownian motion is indispensable for simulating the aggregate structures of the magnetic particles because their internal structure is strongly dependent on particle Brownian motion. In the present study, we have employed a diffuse reflection model for treating the interaction between the fluid and the magnetic particles. The diffuse reflection model gives rise to the tendency that the translational Brownian motion of the magnetic particles is more significantly activated than the rotational Brownian motion. If a scaling coefficient is introduced for modifying the interaction between the fluid and the magnetic particles, a more accurate solution may be obtained in regard to the aggregate structures of the magnetic particles. We may conclude that the MPCD method with the diffuse reflection model is a promising simulation technique for analysing the behaviour of magnetic particles in a suspension.