摘要
为预测湍浮力射流的流速及浓度分布，确认湍浮力流动的应力由应变和浮力作用引起，从而将非线性应力模型和由平衡近似得到的浮力模型组合，建立了非线性各向异性湍浮力模型。该模型避免了数值奇异。应用于潮流底部排放的湍浮力射流模拟，其数值结果合理，并表明该模型能预测浮力在潮流底部排污中的重要影响。
To predict the distribution of velocity and concentration for buoyant turbulence jets. This paper assumes that Reynolds stresses in buoyant turbulent flows are induced by both strain and buoyancy. Thereby, a non linear anisotropy buoyant turbulence model is developed by combining the non linear stress model with buoyant stress model calculated by Rodi's quilibrium hypothesis. The model has taken account of buoyancy and avoided numerical singularity. The model is applied to simulate vertical buoyant jets from the bottoms of tidal flows. The numerical results are reasonable and state that the model can predict the important role of buoyancy in tidal flows.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1998年第11期91-94,共4页
Journal of Tsinghua University(Science and Technology)
基金
国家自然科学基金
关键词
潮流
湍浮力模型
各向异性
河流
废水
排放
tidal flow
buoyant turbulence model
anisotropy
non linear model
