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Numerical investigation of conjugated heat transfer in a channel with a moving depositing front

Li, H.Y., Yap, Y.F., Lou, J., Chai, John and Shang, Z. (2015) Numerical investigation of conjugated heat transfer in a channel with a moving depositing front. International Journal of Thermal Sciences, 88. pp. 136-147. ISSN 12900729

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Abstract

This article presents numerical simulations of conjugated heat transfer in a fouled channel with a moving depositing front. The depositing front separating the fluid and the deposit layer is captured using the level-set method. Fluid flow is modeled by the incompressible Navier–Stokes equations. Numerical solution is performed on a fixed mesh using the finite volume method. The effects of Reynolds number and thermal conductivity ratio between the deposit layer and the fluid on local Nusselt number as well as length-averaged Nusselt number are investigated. It is found that heat transfer performance, represented by the local and length-averaged Nusselt number reduces significantly in a fouled channel compared with that in a clean channel. Heat transfer performance decreases with the growth of the deposit layer. Increases in Reynolds, Prandtl numbers both enhance heat transfer. Besides, heat transfer is enhanced when the thermal conductivity ratio between the deposit layer and the fluid is lower than 20 but it decreases when the thermal conductivity ratio is larger than 20

Item Type: Article
Subjects: T Technology > TJ Mechanical engineering and machinery
Schools: School of Computing and Engineering
Related URLs:
Depositing User: John Chai
Date Deposited: 26 Feb 2015 12:35
Last Modified: 07 Nov 2015 20:35
URI: http://eprints.hud.ac.uk/id/eprint/23341

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