...) camera, while fluid flow visualization is captured using a video camera microscope. Pulsed heat loads resulted in a large temperature overshoot in the test section until the fluid reached the onset of nucleate boiling (ONB), while significant vapor backflow is observed despite the presence of channel...

... growth period during multiphase alternation in the microchannel with vertical upward bulk flow for the mass flux of 200 kg/m 2 s, heat flux of 10 W/cm 2 , and inlet subcooled temperature of 90 °C recorded by the flow visualization system. The cycle started with a small bubble nucleated at the middle...