Abstract
Studies of fluid flow and heat transfer in the fluid under a steady-state condition were made to discuss the heat transfer by convection in the system detailed in a previous paper, in which a hot disk is cooled by an impinging jet of water.
First, the fluid-flow characteristics in each of regions I, II and III which have been defined by several workers were discussed. Approximate solutions of the fluid flow in regions II and III were presented, and it was shown that the solutions of the thickness of liquid film were roughly consistent with experimental values.
Secondly, the heat-transfer characteristics in each of three regions were discussed. Theoretical solutions of the heat-transfer coefficients for region I were shown graphically at Pr (Prandtl number) =0.1-100. And also it was shown that theoretical solutions were consistent with numerical ones at Pr =0.5-15. Numerical solutions of the heat-transfer coefficients for regions II and III with the constant heat flux at the fluid-solid interface were obtained. It was shown that their solutions were roughly consistent with experimental values. The heat-transfer coefficients for the system shown in the previous paper could be roughly expressed by the theory in this paper.
