Two-phase flows in microchannel heat sinks can increase heat removal capabilities in micro electronic devices. Two-phase flows include air-water flow and steam-water flow. An important aspect related to two phase flows in microchannels is the study of boiling phenomena and its characteristics. Flow boiling in microchannels raises a fundamental question on the manner in which the small channel dimension affect the bubble dynamics. Numerical analysis of boiling in two-phase flows is carried out by using Gambit and Fluent. The fluid flow and heat transfer characteristics of two-phase microchannel heat sinks are also determined. A review is carried out on flow boiling in both minichannels and microchannels.

Paper presented to the 5th Annual Symposium on Graduate Research and Scholarly Projects (GRASP) held at the Hughes Metropolitan Complex, Wichita State University, May 1, 2009.Research completed at the Department of Mechanical Engineering, College of Engineering