Abstract
Recently, nano-particle deposition attracts much attention in a wide variety of engineering fields. Nano-particle technology has various utilities, while the nano-particle deposition often exerts a bad influence. In the present study, we made a numerical simulation of a duct flow and observe the nano-particle deposition phenomenon on a flat plate mounted on the bottom wall. The Euler-Lagrange coupling method is employed to reproduce interaction between the particle deposition and the flow field. An isothermal condition is imposed on the bottom and top surfaces of the channel and the flat plate surfaces in order to investigate the thermophoresis effect,. It is indicated that the nano-particle trajectory is drastically affected by the thermophoresis. The deposit layer is formed at the high temperature gradient region. The wake region behind the flat plate creates also a thick deposition layer. Therefore, it is confirmed that the nano-particle deposition is strongly controlled by the flow and thermal fields.
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