ReviewOn heat transfer in Bo¨dewadt flow

- A similarity solution of the thermal energy problem does not exist as long as the surface is impermeable.
- This failure is ascribed to the fact that the axial flow component is directed away from the surface.
- Similarity solutions have been obtained for a porous surface which allows suction.
- The thermal boundary layer became gradually thinner with increasing suction and for higher Prandtl numbers.

Heat transfer in revolving Bo¨dewadt flow above a planar surface has been considered. We have shown that a similarity solution of the thermal energy problem does not exist as long as the surface is impermeable. The failure of the existence of physically realistic similarity solutions for the thermal field is ascribed to the fact that the axial flow component is directed away from the surface. If the planar surface is porous and allows for suction, the direction of the axial flow can be reversed. Similarity solutions have been obtained for some different values of the dimensionless suction velocity A and the Prandtl number Pr. The thermal boundary layer became gradually thinner with increasing suction A and for higher Pr, thereby also increasing the heat transfer rate through the planar surface.