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Abstract: Wall effects for fluid flow and heat transfer in a glass
bead packed channel between two parallel grooved plates are
investigated. The experimental results demonstrated that grooves on the
heated surface changed the contact between the packed beads and the
wall. The grooves on the heated surface lowered the flow resistance and
enhanced the film heat transfer coefficient 2~3 times that of flat
plates. The results suggest that a proper combination of packed beads
and grooves can lead to the optimum heat transfer for a specific
configuration.
Key words: Wall effects Heat transfer enhancement Porous medium
CLC No: TK124
国家自然科学基金(59995550－3)和清华大学“985”基金资助项目.
Received 20010928, received in revised form 20020415
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