Prandtl and Hartmann numbers Effects on Entropy Generation in Natural Convection

El Jery, Atef and Magherbi, Mourad and Ben Brahim, Ammar (0011) Prandtl and Hartmann numbers Effects on Entropy Generation in Natural Convection. International Review on Modelling and Simulations (IREMOS), 4 (5). pp. 2677-2690. ISSN 1974-9821

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The influence of Prandtl number on entropy generation in natural convection under an external uniform magnetic field for different electrically conducting fluids, from liquid metal to liquid passing through gas, in square cavity is numerically studied in steady-unsteady states by solving the mass, the momentum and the energy conservation equations. Entropy generation depends on three parameters which are: the Prandtl, the Hartmann and the thermal Grashof numbers. Effects of these parameters on total and local irreversibilities as well as on heat transfer and fluid flow are studied. It was found that the magnetic field tends to decrease the convection currents, the heat transfer and entropy generation inside the enclosure. The effect of Prandtl number tends to increase the heat transfer, on the other hand tends to decrease the entropy generation.

Item Type: Article
Subjects: Chemical Engineering
Divisions: College Of Engineering > Chemical Engineering
Depositing User: Dr. Atef EL JERY
Date Deposited: 26 Oct 2017 07:22
Last Modified: 26 Oct 2017 07:22

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