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。 In order to predict the velocity and concentration distribution of turbulent buoyant jets, it is confirmed that the stress of turbulent buoyant flow is caused by the strain and buoyancy, and the non-linear anisotropic turbulent buoyancy model is established by combining the nonlinear stress model with the buoyancy model obtained by equilibrium approximation . The model avoids the singularity of the value. The results of numerical simulation of turbulent buoyancy jet applied at the bottom of the tide flow show that the model can predict the important influence of buoyancy on the bottom of the tidal flow.