Influence of heat generation/absorption on mixed convection flow behaviour in the presence of Lorentz forces in a vertical micro circular duct having time periodic boundary conditions: steady periodic regime

• Autorzy: Aina B. , Isa S.

Identyfikatory

DOI

10.2478/ijame-2020-0046

• Języki publikacji: EN

Abstrakty

EN

The problem of mixed convection flow of a heat generating/absorbing fluid in the presence existence of Lorentz forces in a vertical micro circular subjected to a periodic sinusoidal temperature change at the surface has been studied taking the first-order slip and jump effects into consideration. The research analysis is carried out by considering a fully developed parallel flow and steady periodic regime. The governing equations, together with the constraint equations which arise from the definition of mean velocity and temperature, are written in a dimensionless form and mapped into equations in the complex domain. One obtains two independent boundary value problems, which provide the mean value and the oscillating term of the velocity and temperature distributions. These boundary value problems are solved analytically. A parametric study of some of the physical parameters involved in the problem is conducted. The results of this research revealed that the magnetic field has a damping impact on the flow and results in decreases in fluid velocity for both air and water. Furthermore, the presence of the heat generation parameter is seen to enhance the temperature distribution and this is reflected as an increase in the magnitude of the oscillation dimensionless velocity, whereas in the presence of heat absorption a reversed trend occurs.

Słowa kluczowe

EN

mixed convection; micro circular duct; Lorentz force; heat generation; heat absorption; slip and jump; time

PL

konwekcja mieszana; mikrokanał; wytwarzanie ciepła; poślizg

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2020
• Tom: Vol. 25, no. 4
• Strony: 1--21
• Opis fizyczny: Bibliogr. 36 poz., wykr.

Twórcy

autor

Aina B.

• Department of Mathematics, Federal University Gashua Yobe State - NIGERIA

autor

Isa S.

• Department of Mathematics, Federal University Gashua Yobe State - NIGERIA

Bibliografia

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Uwagi

PL

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