Transient conjugate heat transfer between a laminar stagnation zone and a solid disk

Abstract

An explicit finite difference technique is used to solve the case of transient, forced convective conjugate heat transfer between an axisymmetric incompressible laminar impinging jet and a solid disk. The solution to the governing equations is based on the assumptions of constant physical properties and no viscous dissipation. The hydrodynamics of the flow are considered to be steady state, whereas thermal transients take place with a step temperature change at the jet upstream boundary condition. The unexposed bottom surface of the disk is treated as an isothermal boundary, and the radial boundary of the disk is modeled as adiabatic. In this work, the effect of the ratios of thermal conductivity and thermal diffusivity between fluid and solid on transient heat transfer characteristics of the system have been investigated.