摘要
对雷诺应力模型(RSM)在数值模拟热分层流场方面进行了优化,特别是改进了传统的模化方法,通过精确地计算湍流通量输运方程来求解加热湍流中非常重要的热浮力项,然后,将优化后的RSM、标准k ε湍流模型和考虑浮力项的k ε湍流模型对热分层流动和混合流动进行数值模拟。计算结果与实验数据相比较显示,RSM比其它的湍流模型更适合于计算各向异性的热分层流动。
The Reynolds stress model(RSM) was optimized in the simulation of thermally stratified turbulent flow, which was improved in case of heated flows by solving additional transport equations for turbulent heat fluxes and for the variance of temperature fluctuations. In the paper, RSM was given together with the k-Ε model with and without the buoyancy term, and first verified by simulating unheated turbulent pipe flow and then applied to two problems of thermal stratification and mixing. The computational results were also compared with experimental ones. The conclusion is this RSM is the most suitable model to simulate anisotropic turbulence in thermally stratified flows.
出处
《原子能科学技术》
EI
CAS
CSCD
2003年第5期389-394,共6页
Atomic Energy Science and Technology
关键词
热分层
流场
湍流
雷诺应力模型
RSM
热浮力
优化
Buoyancy
Computer simulation
Optimization
Thermal effects
Thermal stratification
