Physical model for heat transfer in porous media
A new geometric model is used to model the flow and heat transfer in a porous medium. Solutions to the governing equations of the model show that this type of simple physical model is successful in predicting the flow characteristics of porous media at a large range of Reynolds numbers and heat transfer characteristics of porous media at lower Reynolds numbers. A momentum equation retains the full viscous terms and is solved analytically by linearizing the inertial term. Experiments have been performed to study the flow characteristics in porous media, and the values of parameter d/l for selected porous metals are determined by these experimental results. The energy equations for both the fluid phase and solid phase of the modeling tube are solved numerically. The numerical scheme used in a finite-difference SOR iteration procedure. Also presented are solutions to the laminar combined hydrodynamic and thermal entry region problem for the case of a circular tube with the boundary conditions of both the constant wall temperature and constant wall heat flux. The numerical results show that the fluid axial conduction has significant effect on heat transfer.
- Research Organization:
- Case Western Reserve Univ., Cleveland, OH (USA)
- OSTI ID:
- 5946148
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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