Time dependent natural convection Couette flow of heat generating/absorbing fluid: accelerated motion

• Autorzy: Jha B. K. , Ajibade A. O.
• Języki publikacji: EN

Abstrakty

EN

The unsteady Couette flow in a channel formed by two vertical parallel plates is investigated in the presence of internal heat generation/absorption. The flow is set up due to time dependent motion of one of the plates coupled with asymmetric heating of the infinite vertical parallel plates. Analytical solutions of the resulting partial differential equations are obtained using the Laplace transforms technique. The numerical values obtained from the analytical expressions for temperature, velocity, Nusselt number, skin-friction and mass flux are presented graphically to study the flow behaviour in the presence of the governing parameters. It is interesting to note that in the absence of convection currents (Gr=0) the flow is dependent only on the motion of one of the channel plates. The influence of the heat generation/absorption parameter on the rate of heat transfer on one plate is the exact opposite of the influence on the other plate while its influence on the skin-friction is identical on both plates. In the presence of external cooling, the mass flux diverges as time increases, while it converges to zero in the case of external heating.

Słowa kluczowe

EN

Couette motion; isothermal boundary condition; accelerated motion; heat generation/absorption

PL

przepływ Couette'a; izotermiczne warunki brzegowe; ruch przyspieszony

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2010
• Tom: Vol. 15, no 4
• Strony: 1083--1100
• Opis fizyczny: Bibliogr. 30 poz., wykr.

Twórcy

autor

Jha B. K.

autor

Ajibade A. O.

• Department of Mathematics Ahmadu Bello University, Zaria-NIGERIA,

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