Investigations of empirical coefficients of cavitation and turbulence model through steady and unsteady turbulent cavitating flows

2014 ◽  
Vol 103 ◽  
pp. 262-274 ◽  
Author(s):  
Chien-Chou Tseng ◽  
Li-Jie Wang
Keyword(s):  
Turbulence Model ◽  
Cavitating Flows ◽  
Empirical Coefficients ◽  
Turbulent Cavitating Flows

Numerical Investigation of the Compressible Flat-Plate Turbulent Boundary Layer with Extended GAO-YONG Turbulence Model

2013 ◽  
Vol 444-445 ◽  
pp. 416-422
Author(s):  
Yang Yang Tang ◽  
Zhi Qiang Li ◽  
Yong Wang ◽  
Ya Chao Di ◽  
Huan Xu ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Boundary Layer ◽  
Turbulent Boundary Layer ◽  
Flat Plate ◽  
Turbulence Model ◽  
Turbulence Models ◽  
Wall Region ◽  
Flow And Heat Transfer ◽  
Empirical Coefficients ◽  
Near Wall

The extended GAO-YONG turbulence model is used to simulate the flow and heat transfer of flat-plate turbulent boundary layer, and the results indicate that GAO-YONG turbulence model may well describe boundary layer flow and heat transfer from near-wall region to far outer area, without using any empirical coefficients and near-wall treatments, such as wall-function or modified low Reynolds number model, which are used widely in all RANS turbulence models.

Efficient implicit LES method for the simulation of turbulent cavitating flows

2016 ◽  
Vol 316 ◽  
pp. 453-469 ◽  
Author(s):  
Christian P. Egerer ◽  
Steffen J. Schmidt ◽  
Stefan Hickel ◽  
Nikolaus A. Adams
Keyword(s):  
Cavitating Flows ◽  
Turbulent Cavitating Flows

A modified filter-based model for simulation of unsteady cavitating flows around a NACA66 hydrofoil

2020 ◽  
pp. 2150032
Author(s):  
Shuwei Zhang ◽  
Hongxun Chen ◽  
Zheng Ma
Keyword(s):  
Time Evolution ◽  
Turbulence Model ◽  
Pressure Coefficient ◽  
Vortex Interaction ◽  
Cavitating Flows ◽  
Suction Surface ◽  
Cloud Cavitation ◽  
Baroclinic Torque ◽  
Text Model ◽  
Good Agreement

Unsteady cavitating turbulent flow around a NACA66 hydrofoil was simulated using a mass transfer cavitation model and a modified filter-based turbulence model in this paper. The modified filter-based turbulence model can accurately predict the pressure coefficient in midplane and shedding frequency of the unsteady cloud cavitation than standard [Formula: see text]–[Formula: see text] model and filter-based turbulence model. The time evolution of transient cavitation cloud structure predicted by the three-turbulence model was compared. The result which was predicted by the modified filter-based turbulence model is in good agreement with the experimental results. The time evolution of re-entrant jet had been analyzed. The instantaneous wall-pressure evolution on the suction surface (SS) predicted by the modified filter-based turbulence model had been analyzed. The cavitation-vortex interaction had been analyzed in this study. The different effects on the cavitation-vortex interaction of the vortex stretching term, vortex dilatation term and baroclinic torque term in the transport equation of vorticity had been discussed.

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