密度分层流中的浮射流模拟

以垂向密度变化的环境流体为背景，采用k ε紊流模型，建立了垂向二维浮射流的数值模型.模型的求解采用有限体积法和SIMPLE算法.针对密度分层流中的浮射流实验，对垂向密度呈线性变化的垂直浮力射流进行了数值模拟，得到射流的密度场、射流轨迹、稀释度和射流宽度等的分布规律.通过数值模拟和实验结果的对比分析表明，两者吻合较好，所建立的垂向二维浮射流紊流模型能够比较精确的模拟分层环境中浮射流的水流状况和射流进入环境流体的混合状况.

Simulation of buoyant flow in density-stratified flow

Taking the vertical density stratified ambient fluid into consideration, a vertical two dimensional model for buoyant jet was established based on a k ε turbulent model. Finite volume method and SIMPLE algorithm were used to obtain the solution of the model. Numerical simulation of vertical buoyant jet in linearly density stratified ambient fluid was simulated, and the distribution of density, trajectory, dilution and width of the jet were obtained. The numerical simulation results were in good agreement with the experimental results, which means that the vertical two dimensional buoyant jet model can exactly simulate the behavior of buoyant jet and the mixture of the buoyant jet and ambient fluid.