|
Abstract:
A new
model for thermal dispersion is proposed based on the character of flow
in porous media, which relates the dispersion with the velocity and
tortuosity of the fluid flow in pores. Compared with former similar
ones, this model has fewer empirical parameters, and therefore it is
expected to be used more widely and conveniently. The temperature
distributions in the nearby wall region can be successfully reproduced
by present model when a single – phase fluid flows through a packed
channel. The predictions of Nu vs. Re agree with the experimental
results well.
Key words:
Thermal
dispersion Seepage flow Porous media Heat transfer
CLC No: TK124
国家自然科学基金资助项目. Received 20000829,
received in revised form 20010112
|