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Mixed convection adjacent to non-isothermal vertical surfaces

Gavara, Madhusudhana R and Dutta, Pradip and Seetharamu, KN (2012) Mixed convection adjacent to non-isothermal vertical surfaces. In: INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 55 (17-18). pp. 4580-4587.

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Official URL: http://dx.doi.org/10.1016/j.ijheatmasstransfer.201...

Abstract

Study of laminar boundary layer in mixed convection from vertical plates is carried out. The surface temperature along the vertical plate is assumed to vary arbitrarily with vertical distance. Perturbation technique is used to solve the governing boundary layer equations. The differentials of the wall temperature are used as perturbation elements, which are functions of vertical distance, to obtain universal functions. The universal functions are valid for any type of vertical wall temperature variation. Heat transfer rates and fluid velocity inside the boundary layer can be expressed and calculated using these universal functions. Heat transfer rates are obtained for the special cases of power-law variation of the wall temperature. The effect of the governing parameter (Gr(y)/Re-y(2)) and the power index of the power-law wall temperature variation on heat transfer rates is studied. For the purpose of validation, the mixed convection results obtained by the present technique pertaining to the special cases of isothermal vertical wall are compared with those obtained by similarity analysis reported in literature, and the agreement is found to be good. (C) 2012 Elsevier Ltd. All rights reserved.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to Elsevier
Keywords: Mixed convection; Non-isothermal vertical surface; Boundary layer analysis; Perturbation technique
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 13 Aug 2012 12:25
Last Modified: 13 Aug 2012 12:25
URI: http://eprints.iisc.ernet.in/id/eprint/44914

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