Effect of rounding of protruding edge on convection heat transfer in a converging–diverging channel

Experiments were performed to determine convection heat transfer characteristics for the rounding of the protruding peaks of a corrugated channel. Results were carried out for a Prandtl number of 0.7 in the Reynolds number range from 2000 to 5000 for the corrugation angle of 30o and channel height of 5 mm. In order to determine the channel having the best performance, the channels were also compared by considering the flow area goodness factor. The heat transfer performance for the channel with rounded corrugation peak is greater than that for the sharp peak about 100%.