This study investigated the effect of rib height on the heat transfer performance of intermittent impinging jets for cooling miniaturized heating components. Experiments were conducted using a circular aluminum plate with a diameter of 250 mm, on which ribs of various heights were installed, under a Reynolds number of 2000 and intermittent frequency of 1 Hz and 2 Hz. The results showed that intermittent jets achieved higher average and local Nusselt numbers than steady jets, with significant enhancement observed particularly behind the ribs. Therefore, rib height and intermittent jet frequency are important factors for enhancing heat transfer.
Horino et al. (Wed,) studied this question.