Forced plume in a stratified fluid
Forced plume in a stratified fluid
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分层流体中的强制羽流
DOI：
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发表时间：
1970
期刊：
影响因子：
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通讯作者：
D. Fox
中科院分区：
文献类型：
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作者：
D. Fox
本文研究了线性分层流体中的湍流浮力射流。通过要求速度、密度差和剪切应力的相似形式，并通过采用控制方程的积分表示，发现环境流体夹带到羽流中的速率是因变量的显式函数。卷吸是雷诺应力、相似剖面形式和局部平均密度弗劳德数的函数。雷诺应力项被证明是有关的常数，如果卷吸率被假定为成比例的平均中心线速度。分析的一个关键参数是速度分布的形式与密度差分布的形式的比率。这个参数接近1的值似乎是最合适的。数值解与实验结果进行了比较，建议值的雷诺应力项。
A turbulent buoyant jet operating in a linearly stratified fluid is investigated. By requiring similarity forms for the velocity, density difference, and shear stress and by adopting an integral representation of the governing equations, the rate of entrainment of ambient fluid into the plume is found to be an explicit function of the dependent variables. The entrainment is a function of the Reynolds stress, the form of the similarity profiles, and the local mean densimetric Froude number. The Reynolds stress term is shown to be related to the constant obtained if the entrainment rate is assumed to be proportional to the mean centerline velocity. A critical parameter of the analysis is the ratio of the form of the velocity profile to the form of the density difference profile. Values of this parameter near unity seem most appropriate. Numerical solutions are compared with experimental results to suggest values for the Reynolds stress term.