Heat transfer at the boundary between a porous medium and a homogeneous fluid

The heat transfer conditions that apply at the boundary between a porous medium and a homogeneous fluid are developed as flux jump conditions based on the non-local form of the volume averaged thermal energy equations for both the fluid and the solid. These jump conditions take the form of surface transport equations that contain excess surface accumulation, convection, and conduction, in addition to a term representing the excess surface heat exchange. It would appear that this latter term controls the manner in which the flux from the porous medium to the homogeneous fluid is distributed between the solid and fluid phases that make up the porous medium. (C) 1997 Elsevier Science Ltd.