Predicting Fully-developed Channel Flow with Zero-equation Model

MM Rahman; K Hasan; Wenchang  Liu; Xinming  Li

Predicting Fully-developed Channel Flow with Zero-equation Model

Authors

MM Rahman Hangzhou Dianzi University, School of Mechanical Engineering, 310018 Hangzhou, China
K Hasan Hangzhou Dianzi University, School of Mechanical Engineering, 310018 Hangzhou, China
Wenchang Liu Hangzhou Dianzi University, School of Mechanical Engineering, 310018 Hangzhou, China
Xinming Li Hangzhou Dianzi University, School of Mechanical Engineering, 310018 Hangzhou, China

Keywords:

Algebraic model, Stress length

Abstract

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 multi-layer 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 ee. The proposed ZEM is intrinsically plausible, having a significant impact on the prediction of wall-bounded turbulence.

MIJST, Vol. 9(2), December 2021: 17-22

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Published

2022-03-14

How to Cite

Rahman, M., Hasan, K., Liu, W. ., & Li, X. . (2022). Predicting Fully-developed Channel Flow with Zero-equation Model. MIST International Journal of Science and Technology, 9(2), 17–22. Retrieved from https://banglajol.info/index.php/MIJST/article/view/58714