Predicting Fully-developed Channel Flow with Zero-equation Model
A new zero-equation model (ZEM) is devised with an eddy-viscosity formulation using a stress length variable which the structural ensemble dynamics (SED) theory predicts. The ZEM is distinguished by obvious physical parameters, quantifying the underlying flow domain with a universal multilayer st...
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| Main Authors: | , , , |
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| 格式: | Article |
| 語言: | 英语 |
| 出版: |
R&D Wing, MIST
2022
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| 主題: | |
| 在線閱讀: | http://dspace.mist.ac.bd:8080/xmlui/handle/123456789/686 |
| 標簽: |
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| 總結: | A new zero-equation model (ZEM) is devised with an eddy-viscosity
formulation using a stress length variable which the structural ensemble
dynamics (SED) theory predicts. The ZEM is distinguished by obvious physical
parameters, quantifying the underlying flow domain with a universal multilayer structure. The SED theory is also utilized to formulate an anisotropic
Bradshaw stress-intensity factor, parameterized with an eddy-to-laminar
viscosity ratio. Bradshaw’s structure-function is employed to evaluate the
kinetic energy of turbulence k and turbulent dissipation rate 𝜺𝜺. The proposed
ZEM is intrinsically plausible, having a significant impact on the prediction of
wall-bounded turbulence. |
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