Investigation On Microstructure And Optical Characteristics By Numerical Simulation Method

Magnetic Fluids possess a variety of unique characteristics because of both the magnetism of nanoparticles material and the fluidity of the carrier liquid. The characteristics of magnetic fluids depend upon the microstructure of the magnetic nanoparticles aggregation. This paper aims at developing the numerical methods to study the three-dimensional microstructure and optical characteristics of magnetic fluids.This paper introduces the Molecular Dynamics method, including its thoughtway, simulation process and simulation details. On the basis of analyzing forces and movements characteristics of the magnetic particles, this paper investigates the microstructure formation in the magnetic fluids by the Molecular Dynamics method. Also, the influences of strength of particle-particle interaction and strength of magnetic-particle interaction to aggregate structure are investigated.This paper establishes the microcosmic model to study the optical character of the magnetic fluids films by the Monte Carlo method based on the microstructures have been simulated. The model simulates the spread process of light in the magnetic fluids film, analysis the influence factor to the spread process and computes the spectral transmittivity statistically. Some factors of affecting the spectral transmittivity of magnetic fluids film are investigated, such as the film thickness, the interface characteristic, the nanoparticle concentration, nanoparticle diameter, strength of applied magnetic field. Furthermore, the relationships between the microstructure and the optical characteristic of the magnetic fluids film are investigated.