Experimental study was performed systematically to investigate heat transfer characteristics at the stagnation point from a simulated microelectronic chip of 5mm×5mm with impinging submerged circular jet

using R113 as the working fluid.Included are single-phase convective heat transfer

incipient boiling superheating

nucleate boiling heat transfer and burnout.The results showed that exit velocity had no influence on incipient boiling point and fully-developed nucleate boiling heat transfer curves

and that single-phase convective heat transfer coefficient and critical heat flux increased with enhanced jet exit velocity

while temperature overshoot decreased.While exit velocity was beyond 10m·s -1

the high heat flux portions of impingement boiling curves needed to be corrected in order to align with pool boiling curves at the same fluid subcooling.