This article presents a computational study of saturated flow boiling in non-circular microchannels. The unit channel multi-microchannel evaporator, consisting the fluidic and surrounding evaporator walls, is simulated conjugate heat transfer problem solved. Simulations are performed using OpenFOAM v2106 built-in geometric Volume Of Fluid method, augmented with self-developed libraries to inclu...

Silicon microchannels with microporous decorated sidewalls were applied to enhance water flow boiling heat transfer, especially the critical flux (CHF). In experiments, a CHF of 473 W/cm2 based on heater areas (210 if effective heating areas) was achieved in proposed at mass 389 kg/cm2, accounting for 205% enhancement compared that plain-wall without compromising pressure drop. addition, an imp...

Forced convection boiling in microchannels is studied experimentally under the uniform heat flux boundary condition. Several microchannel heat sinks with integrated temperature sensors, spanning two orders of magnitude in height 5–500 μm, have been fabricated with designed nucleation sites on the bottom surfaces. The microchannels are capped by a glass wafer to monitor bubble activity using vid...

To reduce the invasiveness of cryosurgery, a miniaturized cryoprobe is necessary. The authors have developed an ultrafine cryoprobe for realizing low-invasive cryosurgery by local freezing. The objectives of this study are to estimate the heat transfer coefficient and investigate the characteristics of the phase change heat transfer in the ultrafine cryoprobe. This cryoprobe has a double-tube s...