Investigation On Properties Of Magnetic Fluids By The Lattice Boltzmann Method

The lattice Boltzmann method is a novel approach of numerical simulation for fluid hydrodynamics. It comes from the discrete movement theory and statistic physics and has been applied to fluid flow and heat transfer simulation. In this paper, the lattice Boltzmann method is applied to investigate properties of magnetic fluids.This paper detailedly introduces the Lattice Boltzmann method. In order to improve numerical stabilization, the lattice Boltzmann fractional propagation scheme is put forward to deal with low viscosity cases. Methods to deal with force term are also introduced in the paper, and examples such as cavity flow and Benard convection are simulated. At the same time, basic properties of magnetic fluids are described in the paper, as well as detailed analysis of interaction between magnetic nanoparticles. On the basis of above theories, appropriate lattice Boltzmann models for magnetic fluids are established corresponding to different properties such as: magnetization properties, interface properties, thermomagnetic convection, and flowing with heat transfer. Simulating and result analysis are carried out subsequently.Results of calculating and simulation for magnetic fluids using the lattice Boltzmann model show that, the lattice Boltzmann method can effectively deal with the complex interaction between magnetic nanoparticles, and that the lattice Boltzmann method can excellently simulate the complicated behavior of magnetic fluids, especially on qualitative sense.