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Second Law Analysis of Buoyancy Driven Unsteady Channel Flow of Nanofluids with Convective Cooling
Applied and Computational Mathematics
Volume 4, Issue 3, June 2015, Pages: 100-115
Received: Mar. 30, 2015; Accepted: Apr. 12, 2015; Published: Apr. 21, 2015
Authors
Michael Hamza Mkwizu, School of Computational and Communication Science and Engineering, Nelson Mandela African Institution of Science and Technology, (NM-AIST), Arusha, Tanzania
Oluwole Daniel Makinde, Faculty of Military Science, Stellenbosch University, Saldanha, South Africa
Yaw Nkansah-Gyekye, School of Computational and Communication Science and Engineering, Nelson Mandela African Institution of Science and Technology, (NM-AIST), Arusha, Tanzania
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Abstract
We investigate the combined effects of buoyancy force and convective cooling on entropy generation in unsteady channel flow of water based nanofluids containing Copper (Cu) and Alumina (Al2O3) as nanoparticles. Both first and second laws of thermodynamics are utilised to analyze the model problem. Using a semi discretization finite difference method together with Runge-Kutta Fehlberg integration scheme, the governing partial differential equations are solved numerically. Graphical results on the effects of parameter variation on velocity, temperature, skin friction, Nusselt number, entropy generation rate, irreversibility ratio and Bejan number are presented and discussed.
Keywords
Channel Flow, Nanofluids, Buoyancy Force, Heat Transfer, Entropy Generation, Water, Copper, Alumina
Michael Hamza Mkwizu, Oluwole Daniel Makinde, Yaw Nkansah-Gyekye, Second Law Analysis of Buoyancy Driven Unsteady Channel Flow of Nanofluids with Convective Cooling, Applied and Computational Mathematics. Vol. 4, No. 3, 2015, pp. 100-115. doi: 10.11648/j.acm.20150403.12
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