首页> 外文期刊>St. Petersburg Polytechnic University Journal: Physics and Mathematics >The development of a stratified flow following over a sphere inside the viscous fluid in the presence of internal or surface waves
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The development of a stratified flow following over a sphere inside the viscous fluid in the presence of internal or surface waves

机译:在内部或表面波的存在下,在粘性流体内的球体上进行分层流动的发展

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This study has used the Large Eddy Simulation (LES) for numerical simulation of internal or surface waves. The viscous stratified flow over a sphere was investigated at the Reynolds and the Froude numbers Re = 2?105 , Fr = 1.3 for simulation of the flow over the sphere in the presence of the internal waves, and at the internal Froude number Fri = 25 for that in the presence of the surface ones. The presence of background internal waves was found to result in an increase in the turbulent viscosity in the flow behind the sphere and in the vertical shift of the turbulent viscosity’s maximum value. Moreover, their presence in the linearly stratified flow leads to a change in the density distribution of the near-surface layers of liquid. In this case the internal-wave breaking and wave mixing occur. The last one is caused by interaction between the internal waves generated by the surface waves and the sphere.
机译:该研究使用了大型涡流模拟(LES),用于内部或表面波的数值模拟。在雷诺和FRoude号码Re = 2?105,FR = 1.3处研究了球体上的粘性分层流动,用于在内部波的存在下模拟球体上的流量,并且在内部Froude号Fri = 25在表面存在下。发现了背景内波的存在导致球体后面流动的湍流粘度增加,并且在湍流粘度的最大值的垂直偏移中增加。此外,它们在线性分层流中的存在导致近表面层的密度分布的变化。在这种情况下,发生内部波断裂和波浪混合。最后一个是由由表面波和球体产生的内波之间的相互作用引起的。

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