Non-uniform mass transfer or wall enthalpy into a compressible flow over a rotating sphere

Subhashini, S. V., Takhar, Harmindar S. and Nath, Girishwar (2007) Non-uniform mass transfer or wall enthalpy into a compressible flow over a rotating sphere. Heat and mass transfer, 43 (11). pp. 1133-1141. ISSN 0947-7411

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Abstract

study for the effect of non-uniform slot injection/suction and non-uniform total enthalpy at the wall for a steady non-similar laminar compressible boundary layer flow over a rotating sphere is presented. The effects of rotation and free stream Mach number have also been considered. Non-similar solutions have been obtained from the starting point of the stream wise coordinate to the point of separation using an implicit finite difference scheme in combination with the quasi-linearization technique. The results indicate that the separation can be delayed by non-uniform slot suction and also by moving the slot downstream but the non-uniform slot injection has just the opposite effect. An increase of rotation and total enthalpy at the wall causes separation to occur earlier while cooling delays it. An increase of the Mach number shifts the point of separation upstream due to the adverse pressure gradient. The non-uniform total enthalpy at the wall has a very little effect on the skin friction and hence on the point of separation.