强迫对流混水过程熵产数值模拟  

Numerical Simulation on Entropy Generation in Forced Convection Mixed Water

作　　者：孟凡康[1] 王珏[1] 闫明慧[1] 

机构地区：[1]辽宁工程技术大学建筑与工程学院,阜新辽宁123000

出　　处：《水资源与水工程学报》2009年第4期83-86,共4页Journal of Water Resources and Water Engineering

基　　金：辽宁工程技术大学优秀青年基金(2007A10)

摘　　要：利用热和流体流动控制方程,同时考虑粘性耗散效应,以伴有温差的强迫对流混水三通为研究对象,分析讨论了熵产的分布以及随速度在1.36 m/s^2.05 m/s之间的变化关系。分析结果表明:熵产主要分布在两根进水管的交汇区域,最大熵产出现在冷热水交汇区域的上下拐角处。熵产的面积加权平均.Sgen随着速度的变化呈指数形式变化;■与速度之间呈线性关系;在总熵产中,粘性熵产占绝对比重,且随着速度的增大,其占总熵产的比例也越来越大。Using heat and flow governing equation, considering viscosity dissipation effect and studying forced convection mixed water tee with different temperature, this paper analyzed the entropy generation distribution with the velocity from 1.36 m/s to 2.05 m/s. The results indicated that ： entropy mainly generated in the join area of the two flow pipes and the maximal entropy oceured in the upper and down corner of cooling and hot water mix area. The area weighted average Sgen varies with velocity in exponent function. Entropy generation NFFI / NHTI was linear to velocity. In total entropy generation, viscosity entropy generation was dominant and its proportion became larger with increase of velocity.

关 键 词：混水三通 强迫对流 熵产分布 温度分布 数值模拟 

分 类 号：O242[理学—计算数学]