Experiments were conducted to investigate flow boiling heat transfer to a dielectric fluid in a silicon chip-integrated microchannel heat sink. Twenty-four microchannels, each 389 m  389 m in crosssection, were fabricated into the 12.7 mm  12.7 mm silicon substrate. High-speed visualizations (at 12,500 frames per second) were performed simultaneously with heat transfer and pressure drop mea...

The effect of flow instabilities on flow boiling heat transfer in microchannels is investigated using water as the working fluid. The experimental test section has six parallel rectangular microchannels with each having a cross sectional area of 1054 × 197 microns. Flow restrictors are introduced at the inlet of each microchannel to stabilize the flow boiling process and avoid the backflow phen...

Jet impingement two-phase cooling is often used to handle the high heat fluxes of high-performance electronics. While much literature focuses on thermal–hydraulic performance, effects fin geometry transfer and pressure drop have not been thoroughly investigated. This study was undertaken examine those factors more closely. The performance a sink studied for three different configurations: micro...

Placing cylindrical vortex generators (VGs) at the base of a uniform micro-channel heat sink (MCHS) enhances transfer, but incurs substantial pressure drop. The effect different VG parameters, including position (front, middle or back), radius (R) in range (100–300) μm and distance (D) between them (0–500) are considered to enhance conjugate transfer. Laminar flow flux conditions relevant micro...

A novel heatsink based on a multilayer stack of thin metal plates with staggered honeycomb cell microchannels was investigated in this paper. A series of working-parametric tests such as different heat sink pipe diameter and pumping power were conducted for the microchannel cooling system to determine the heat transfer performance under small flow rate conditions. For the double fluid flow inle...

The topic of this doctoral thesis is energy efficient electronic cooling using hot water as coolant. The aim of the work is to provide a viable solution to reduce the energy spent for cooling supercomputers and allow energy reuse for secondary applications. A transition from air cooling to single phase liquid (water) cooling is proposed to master the challenge of ever increasing heat dissipatio...