Second Law Analysis of Laminar Flow In A Channel Filled With Saturated Porous Media

Entropy

O. D. Makinde¹ 

[1] Applied Mathematics Department, University of Limpopo, Private Bag X1106, Sovenga 0727, South Africa

关键词: laminar flow;    porous medium;    entropy generation;    irreversibility ratio;   

DOI  :  10.3390/e7020148

来源: mdpi

【 摘 要 】

The entropy generation rate in a laminar flow through a channel filled with saturated porous media is investigated. The upper surface of the channel is adiabatic and the lower wall is assumed to have a constant heat flux. The Brinkman model is employed. Velocity and temperature profiles are obtained for large Darcy number (Da) and used to obtain the entropy generation number and the irreversibility ratio. Generally, our result shows that heat transfer irreversibility dominates over fluid friction irreversibility (i.e. 0 < ø < 1), and viscous dissipation has no effect on the entropy generation rate at the centerline of the channel.

【 授权许可】

CC BY   
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.