Abstract
Brownian diffusion is one of the most important and interesting natures of aerosol particles. It has much effects on aerosols in small-sized space such as aerosol transport through a tube, instruments for aerosol measurements, and fabrication of especially nano-sized aerosols. Numerical simulations of aerosol transport are useful in analysis of aerosol behavior. Aerosol modeling of diffusion has often been carried out using diffusion equation of aerosol. Another way to represent the Brownian diffusion is to solve a Langevin dynamics equation. Due to the rapid advance in computational technology, it is now possible to solve the Langevin dynamics equation. It has been applied to problems that could not be solved by conventional diffusion equations in the previous studies. In this article, we introduced two applications of the Langevin dynamics equation : aerosol diffusion between two parallel walls and aerosol deposition from a laminar flow through a cylindrical tube.
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