The effect of MHD on free convection with periodic temperature and concentration in the presence of thermal radiation and chemical reaction

• Autorzy: Zigta P. , Koya P. R.

Identyfikatory

DOI

10.1515/ijame-2017-0068

• Języki publikacji: EN

Abstrakty

EN

This paper studies the effect of magneto hydrodynamics on unsteady free convection between a pair of infinite vertical Couette plates. The temperature of the plates and concentration between the plates vary with time. Convection between the plates is considered in the presence of thermal radiation and chemical reaction. The solution is obtained using perturbation techniques. These techniques are used to transform nonlinear coupled partial differential equations to a system of ordinary differential equations. The resulting equations are solved analytically. The solution is expressed in terms of power series with some small parameter. The effect of various parameters, viz., velocity, temperature and concentration, has been discussed. Mat lab code simulation study is carried out to support the theoretical results. The result shows that as the thermal radiation parameter R increases, the temperature decreases near the moving porous plate while it approaches to a zero in the region close to the boundary layer of the stationary plate. Moreover, as the modified Grashof number, i.e., based on concentration difference, increases, the velocity of the fluid flow increases hence the concentration decreases. An increase in both the chemical reaction parameter and Schmidt number results in decreased concentration.

Słowa kluczowe

EN

MHD; unsteady free convection; thermal radiation; chemical reaction; Couette porous plates

PL

magnetohydrodynamika; konwekcja swobodna; promieniowanie cieplne; reakcja chemiczna; przepływ Couette'a

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2017
• Tom: Vol. 22, no. 4
• Strony: 1059--1073
• Opis fizyczny: Bibliogr. 22 poz., wykr.

Twórcy

autor

Zigta P.

• School of Mathematical and Statistical Sciences, Hawassa University ETHIOPIA

autor

Koya P. R.

• School of Mathematical and Statistical Sciences, Hawassa University ETHIOPIA

Bibliografia

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