Diffusion in monodisperse ferrofluids

8th International Congress of Engineering Physics

物理学;工业技术

Peredo-Ortíz, R.^1 ; Hernandez-Contreras, M.^1 ; Hernández Gómez, R.^2

Departamento de Física, Centra de Investigación y Estudios Avanzados, Instituto Politécnico Nacional, Apartado Postal 14-740, México Distrito Federal, Mexico^1

Departamento de Computación, Centra de Investigación y Estudios Avanzados, Instituto Politécnico Nacional, Apartado Postal 14-740, México Distrito Federal, Mexico^2

关键词: Brownian dynamic simulations;    Concentrated suspension;    Dipole interaction;    Dynamical properties;    Langevin equation;    Micro-structural;    Mono-disperse ferrofluids;    Rotational Brownian motions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/792/1/012099/pdf
DOI  :  10.1088/1742-6596/792/1/012099

学科分类：工业工程学

来源: IOP

【 摘 要 】

The diffusion coefficients characterizing the translational and rotational Brownian motion of a particle in a concentrated suspension were determined in the long time diffusive regime for a ferrofluid suspension with the use of a Langevin equation approach. These dynamical properties depend on the equilibrium micro-structural information of the suspension and take into account the effect of direct anisotropic inter-particle's interactions on self-diffusion. The comparison of this theory with Brownian dynamic simulations results is made in terms of colloid density and dipole interaction strength.