Preferential Brownian Motion Induced by a Fluid with Inhomogeneous Temperature

5th International Conference on Mechanics and Mechatronics Research

机械制造;无线电电子学

Li, Qucheng^1 ; Nie, Deming^1

Institute of Fluid Mechanics, China Jiliang University, Hangzhou, China^1

关键词: Brownian;    Brownian particles;    Cold area;    Cold fluid;    Hot fluids;    Lattice Boltzmann method;    Motion of particles;    Thermal fluctuations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/417/1/012030/pdf
DOI  :  10.1088/1757-899X/417/1/012030

来源: IOP

【 摘 要 】

In the present work the fluctuating lattice Boltzmann method was used to numerically study the Brownian motion of particles in a fluid with inhomogeneous temperature. It has been shown that the Brownian particles are preferential to move into the cold fluid area due to small thermal fluctuations. In addition, the boundary between hot fluid and cold fluid prevents the particles going outside once they enter into the cold area. As a consequence, the Brownian particles can be captured or collected by the cold fluid area if the temperature of cold fluid is low enough.