各向异性湍浮力模型的研究  

Study on Anisotropic Buoyant Turbulence Model

作　　者：阳坤[1] 洪益平[1] 周雪漪[1] 李玉梁[1] 

机构地区：[1]清华大学水利水电工程系,北京100084

出　　处：《应用数学和力学》2000年第1期39-44,共6页Applied Mathematics and Mechanics

基　　金：国家自然科学基金!(59479021)

摘　　要：通过对隐式代数应力模型应力结构的分析，认为湍浮力流动的应力由应变和浮力作用引起，从而利用应力输运的线性近似和平衡近似提出了非线性各向异性湍浮力模型·　该模型避免了数值奇异，其可靠性通过计算和实验的对比得到了验证·By analyzing the components of Reynolds stresses of implicit algebraic stress model(IASM) in the paper, that Reynolds stresses in buoyant turbulent flows were produced by both strain and buoyancy is considered. Consequently, a nonlinear anisotropy buoyant turbulence model was developed by applying linearity of equilibrium hypothesis to Reynolds stress transports. The model avoids numerical singularity and its reliability is verified by the comparisons between predictions and experimental data.

关 键 词：代数应力模型 湍浮力模型 各向异性 浮力流动 

分 类 号：O357.5[理学—流体力学]