DIRECT NUMERICAL SIMULATIONS OF FORCED CONVECTION HEAT TRANSFER IN CHANNELS WITH SUPERCRITICAL WATER

摘要：

Direct numerical simulations are used to investigate the forced-convection heat-transfer characteristics in channels without the effect of buoyancy, and with water in the supercritical thermodynamic state as the working fluid. The aim of this paper is to report on the physical mechanisms contributing to variations in heat transfer observed in experiments that use such working fluids. Specifically, it is observed that the wall-normal property gradients contribute to the heat transfer variation through changes in local streamwise thermal resistance. Spatial gradients in the thermophysical properties also influence the hydrodynamic stability of the boundary layer which, in the present study, leads to degradation in turbulent mixing, and thus further affects the rate of forced-convection heat transfer.

作者: C.Azih M.I.Yaras

作者单位: Department of Mechanical and Aerospace Engineering Carleton University,Ottawa,Ontario,Canada

会议类型: 国际会议

会议名称: 3rd China-Canada Joint Workshop on Supercritical Water-Cooled Reactors(第三届中国-加拿大超临界水堆研讨会 (CCSC-2012)

会议地点: 西安

会议语种:英文

页码: 1-13

在线出版日期: 2012-04-18（万方平台首次上网日期，不代表论文的发表时间）