摘要
本文采用RSM模式数值研究了温度和盐度的分层流动中湍流动量的逆梯度输运现象,并把计算结果和已有的实验结果进行了比较。计算主要考虑了分层强度、剪切率以及温度和浓度分层对湍流动量逆梯度输运的影响。由计算结果表明:在非剪切的分层流动中,温度分层,出现湍流动量的逆梯度输运。而盐度分层流动不出现湍流动量逆梯度输运现象。剪切分层流动中,剪切减小湍流动量的逆梯度输运。并且分层强度对温度分层比盐度分层影响大。
Turbulent counter gradient momentum transport in stratified flows is numerically investigated by RSM model in this paper, the effects of shear rate and stratified intensity are considered in details in turbulent thermal and salted stratified flows, and the computational results of flow field are compared with experimental results respectively. The results indicate that the shear rate and stratified intensity take an important effect on turbulent counter gradient transport, and that it is more apparent in thermal stratification than in salt stratification under the conditions of same stratified intensity.
出处
《水动力学研究与进展（A辑）》
CSCD
北大核心
2005年第4期426-435,共10页
Chinese Journal of Hydrodynamics
基金
国家自然科学基金项目(10272071
10472063)
关键词
分层流
动量输运
逆梯度
数值模拟
stratified flow
momentum transport
counter gradient
numerical simulation
