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Dynamics of a single buoyant plume in a FENE-P fluid
Physics of Fluids ( IF 4.6 ) Pub Date : 2017-09-01 , DOI: 10.1063/1.4986749
Bhaskar Vajipeyajula 1 , Tejsavi Khambampati 1 , Robert A. Handler 2
Affiliation  

The dynamics of a single laminar buoyant plume in a FENE-P (finitely extensible nonlinear elastic-Peterlin) fluid has been investigated by performing a series of direct simulations over a range of Weissenberg numbers. Examination of this flow has given insight into the heat transfer reduction phenomenon observed recently in more complex Rayleigh-Benard turbulence. The simulations, which were performed with a Rayleigh number of 2.53×106 and a maximal polymeric extension of L = 100, show that the wall heat flux is reduced by about 28% at a Weissenberg number of 20, which is in reasonable agreement with the results obtained in Rayleigh-Benard turbulence. In addition, the global flow kinetic energy was reduced by about one order of magnitude.

中文翻译:

FENE-P 流体中单个浮力羽流的动力学

通过在一系列 Weissenberg 数上执行一系列直接模拟,研究了 FENE-P(有限可扩展非线性弹性彼得林)流体中单层流浮力羽流的动力学。对这种流动的检查使人们深入了解了最近在更复杂的瑞利-贝纳德湍流中观察到的传热减少现象。使用瑞利数为 2.53×106 和最大聚合物延伸率 L = 100 进行的模拟表明,当魏森伯格数为 20 时,壁面热通量降低了约 28%,这与在 Rayleigh-Benard 湍流中获得的结果。此外,全球流动动能减少了大约一个数量级。
更新日期:2017-09-01
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