A GENERALIZED THERMAL-BOUNDARY CONDITION

A generalized thermal boundary condition is derived to include all the rmal effects of a thin layer which is in thermal contact with an adjac ent domain. The thin layer may be a stationary or moving solid-skin or fluid-film. The included thermal effects of the thin layer are the th ermal capacity of the layer, thermal diffusion, enthalpy flow, viscous dissipation within the layer, convective losses from the layer, and o ther effects. Six different kinds of thermal boundary conditions can b e obtained as special cases of the generalized boundary condition. The generalized boundary condition is given for perfect and imperfect the rmal contact between the thin layer and its adjacent domain. The impor tance of the generalized boundary condition is demonstrated in an exam ple.