Heat transfer in a rotating channel with porous walls

Abstract

An attempt has been made to investigate the effects of uniform suction and injection in the temperature distribution and heat transfer, when a straight channel formed by two parallel porous walls, through which liquid is flowing under a constant pressure gradient, is rotated about an axis perpendicular to the walls. Closed form solutions for temperature θ, Nusselt numberNu are derived. It is found that for a fixed Eckert numberE and Prandtl numberPr, the temperature at any point of the fluid decreases in both cases (i) for a fixed Taylor’s number α but with an increase in suction Reynolds number β (ii) for a fixed β but with an increase in α. Also for a fixedE andPr, the Nusselt numberNu is found to decrease in either case. All other parameters remaining fixed, the effect of increasingE is to increase both the temperature at any point of the fluid and the Nusselt number.