TRANSIENT CONJUGATE HEAT-TRANSFER BETWEEN A LAMINAR STAGNATION ZONE AND A SOLID DISK

An explicit finite difference technique is used to solve the case of t ransient, forced convective conjugate heat transfer between an axisymm etric incompressible laminar impinging jet and a solid disk. The solut ion 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 boundar y condition. The unexposed bottom surface of the disk is treated as an isothermal boundary, and the radial boundary of the disk is modeled a s adiabatic. In this work, the effect of the ratios of thermal conduct ivity and thermal diffusivity between fluid and solid on transient hea t transfer characteristics of the system have been investigated.