Thermal Viscous Dissipative Couette-Poiseuille Flow in a Porous Medium Saturated Channel


Lim, Boon Kian and Tso, Chih Ping and Chen, Gooi Mee and Farrukh B., M. (2019) Thermal Viscous Dissipative Couette-Poiseuille Flow in a Porous Medium Saturated Channel. Symmetry, 11 (7). ISSN 2073-8994

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A Couette-Poiseuille flow between parallel plates saturated with porous medium is studied with emphasis on viscous dissipation effect on the temperature field; assuming a fully developed flow, with both plates subjected to unequal and uniform heat flux. Temperature field and Nusselt number are derived as a function of Brinkman number and porous medium shape factor. By specifying the ratio of wall to mean velocity as one, the resulting velocity and temperature fields attribute to a significant increase in Nusselt number for the moving wall as the permeability of porous medium increases. Increased permeability signifies competing effect between enhanced convection in the proximity of the moving wall and higher local viscous dissipation. When the former effect dominates, heat transfer coefficient increases. Effects of Reynolds number on the temperature field is elucidated, including a comparison between a microchannel and conventional duct to evaluate the characteristic length scale effect. As Reynolds number goes up in a microchannel, heat generation in the form of viscous dissipation intensifies and overrides the convection effect, causing an increase in the highest temperature along the duct on the contrary to the findings in conventional duct.

Item Type: Article
Uncontrolled Keywords: viscous dissipation, forced convection, Couette-Poiseuille flow, porous medium
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA349-359 Mechanics of engineering. Applied mechanics
Divisions: Faculty of Engineering and Technology (FET)
Depositing User: Ms Suzilawati Abu Samah
Date Deposited: 25 Feb 2022 00:59
Last Modified: 25 Feb 2022 00:59


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