Transient thermophoretic particle deposition on forced convective heat and mass transfer flow due to a rotating disk

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• 作者：M.S. Alam^a ; ^{dralamjnu@gmail.com" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; S.M. Chapal Hossain^a ; ^{chapal707@gmail.com" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; M.M. Rahman^b ; ^{mansurdu@yahoo.com" class="auth_mail" title="E-mail the corresponding author}Author Vitae
• 关键词：Forced convection ; Heat transfer ; Mass transfer ; Unsteady flow ; Rotating disk ; Thermophoresis
• 刊名：Ain Shams Engineering Journal
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：7
• 期：1
• 页码：441-452
• 全文大小：2124 K

文摘

This paper investigates thermophoretic deposition of micron sized particles on unsteady forced convective heat and mass transfer flow due to a rotating disk. Using similarity transformations the governing nonlinear partial differential equations are transformed into a system of ordinary differential equations that are then solved numerically by applying Nachtsheim–Swigert shooting iteration technique along with sixth-order Runge–Kutta integration scheme. The effects of the pertinent parameters on the radial, tangential and axial velocities, temperature and concentration distributions, and axial thermophoretic velocity together with the local skin-friction coefficient, and local Nusselt number are displayed graphically. The inward axial thermophoretic deposition velocity (local Stanton number) is also tabulated. The obtained results show that axial thermophoretic velocity is increased with the increasing values of the thermophoretic coefficient, thermophoresis parameter, rotational parameter as well as unsteadiness parameter. The results also show that inward axial thermophoretic particle deposition velocity decreases with the increase of the Lewis number.