Entropy analysis of a variable viscosity MHD Couette flow Between two concentric pipes with convective cooling

• Autorzy: Makinde Oluwole Daniel , Eegunjobi Adetayo Samuel

Identyfikatory

DOI

10.24423/EngTrans.1104.20200720

• Języki publikacji: EN

Abstrakty

EN

This paper addresses the combined effects of the magnetic field, thermal buoyancy force, viscous dissipation, Joule heating and temperature-dependent viscosity on the Couette flow of an incompressible conducting fluid between two concentric vertical pipes. It is assumed that convective cooling occurs at the surface of the outer moving pipe while the surface of the inner fixed pipe is maintained at a constant temperature. The nonlinear equations for momentum and energy are obtained and solved numerically using a shooting method coupled with the Runge-Kutta-Fehlberg integration procedure. Relevant results depicting the effects of embedded thermophysical parameters on the velocity and temperature profiles, skin friction, the Nusselt number, entropy generation rate and the Bejan number are presented graphically and discussed. It is found that an increase in the magnetic field intensity boosts the entropy generation rate while an increase in convective cooling lessens it.

Słowa kluczowe

EN

MHD; variable viscosity; Couette flow; concentric pipes; buoyancy force; heat transfer

• Wydawca: Instytut Podstawowych Problemów Techniki PAN
• Czasopismo: Engineering Transactions
• Rocznik: 2020
• Tom: Vol. 68, iss. 4
• Strony: 317--334
• Opis fizyczny: Bibliogr. 23 poz., rys., wykr.

Twórcy

autor

Makinde Oluwole Daniel

• Faculty of Military Science Stellenbosch University Private Bag X2, Saldanha 7395, South Africa

autor

Eegunjobi Adetayo Samuel

• Mathematics Department Namibia University of Science and Technology 13 Jackson Kaujeua Street, Windhoek, Namibia

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).