The Volume-Averaged Energy Equations
The chapter presents an exposition of the governing equations for heat transfer between the solid and fluid phases of a saturated porous medium. Volume-averaged equations are developed from first principles based on Wittaker’s formulation for the solid and fluid phases with application to the current case where there is convective motion and dispersion in the fluid phase. A one-equation model is developed. Determining thermal dispersion is a remaining unsolved problem.