Bubble Dynamics, Flow, and Heat Transfer during Flow Boiling in Parallel Microchannels

Author: Suh Youngho   Lee Woorim   Son Gihun  

Publisher: Taylor & Francis Ltd

ISSN: 1521-0634

Source: Numerical Heat Transfer Part A: Applications, Vol.54, Iss.4, 2008-01, pp. : 390-405

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

Previous Menu Next

Abstract

Significant efforts have recently been made to investigate flow boiling in microchannels, which is considered an effective cooling method for high-power microelectronic devices. However, a fundamental understanding of the bubble motion and flow reversal observed during flow boiling in parallel microchannels is lacking in the literature. In this study, complete numerical simulations are performed to further clarify the boiling process by using the level-set method for tracking the liquid-vapor interface which is modified to treat an immersed solid surface. The effects of contact angle, wall superheat, and the number of channels on the bubble growth, reverse flow, and heat transfer are analyzed.