Bubble Coalescence Heat Transfer During Subcooled Nucleate Pool Boiling  

作　　者：Abdoulaye Coulibaly LIN Xipeng Bi Jingliang David M Christopher 

机构地区：[1]Department of Thermal Engineering,Tsinghua University

出　　处：《工程热物理学报》2012年第12期2171-2175,共5页Journal of Engineering Thermophysics

基　　金：National Natural Science Foundation of China(Grant No.50876050);National Basic Research Program of China("973"Project)(Grant No.2011CB706904)

摘　　要：Bubble coalescence during subcooled nucleate pool boiling was investigated experimentally using constant wall temperature boundary conditions while the wall heat flux was measured at a various locations to understand the effects of coalescence on the heat transfer.The observations showed that the coalesced bubble moved and oscillated on the heater surface with significant heat transfer variations prior to departure.Some observations also showed coalescence with no increase in the heat transfer rate.The heat flux for boiling with coalescence fluctuated much more than for single bubble boiling due to the vaporization of the liquid layer trapped between the bubbles.Bubble coalescence during subcooled nucleate pool boiling was investigated experimentally using constant wall temperature boundary conditions while the wall heat flux was measured at a various locations to understand the effects of coalescence on the heat transfer. The observations showed that the coalesced bubble moved and oscillated on the heater surface with significant heat transfer variations prior to departure. Some observations also showed coalescence with no increase in the heat transfer rate. The heat flux for boiling with coalescence fluctuated much more than for single bubble boiling due to the vaporization of the liquid layer trapped between the bubbles.

关 键 词：MICROHEATER pool boiling bubble coalescence bubble dynamics 

分 类 号：TK124[动力工程及工程热物理—工程热物理]