Examining the κ-ϵ model by means of a wind tunnel test and large-eddy simulation of the turbulence structure around a cube

1990 ◽  
Vol 35 ◽  
pp. 87-100 ◽  
Author(s):  
Shuzo Murakami ◽  
Akashi Mochida ◽  
Yoshihiko Hayashi
Keyword(s):  
Wind Tunnel ◽  
Large Eddy Simulation ◽  
Wind Tunnel Test ◽  
Turbulence Structure ◽  
Eddy Simulation ◽  
Large Eddy

scholarly journals Evaluation of Shear Stress Transport, Large Eddy Simulation and Detached Eddy Simulation for the Flow around a Statically Loaded Tire

Symmetry ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1319
Author(s):  
Haichao Zhou ◽  
Huiyun Li ◽  
Qingyun Chen ◽  
Lingxin Zhang
Keyword(s):  
Shear Stress ◽  
Wind Tunnel ◽  
Large Eddy Simulation ◽  
Surface Pressure ◽  
Pressure Coefficient ◽  
Wind Tunnel Test ◽  
Tire Model ◽  
Detached Eddy Simulation ◽  
Eddy Simulation ◽  
Large Eddy

To select a more suitable turbulence model to study tire aerodynamics, the characteristics of a deformed profile of a 185/65 R14 passenger tire were reproduced using 3D printing technology. Based on the distance from automobile chassis to the ground, a partially loaded tire model with a height of 150 mm was selected in this paper, and the surface pressure coefficient of the tire model was determined using a wind tunnel test. A computational fluid dynamics (CFD) model was established according to the tire wind tunnel test. The surface pressure coefficient results of three turbulence models, shear stress transport (SST) k-ω, large eddy simulation (LES), and detached eddy simulation (DES) were obtained. Compared with the wind tunnel test results, the mean relative errors of the surface pressure coefficients predicted using SST, LES, and DES in the longitudinal section were 22.4%, 20.9%, and 14.8%, respectively. The LES and DES can capture details of the unsteady flow field that were not predicted by SST. By synthetically analyzing the results of the surface pressure coefficient and flow fields, the DES model is more advantageous than the other two models in predicting the flow characteristics around a statically loaded tire. This study can help designers in the tire industry to apply these cost-effective tools for minimizing the aerodynamic drag of a new tire design.

Large-eddy simulation and wind tunnel study of flow over an up-hill slope in a complex terrain

2009 ◽  
Vol 12 (3) ◽  
pp. 219-237 ◽  
Author(s):  
C.F. Tsang ◽  
Kenny C.S. Kwok ◽  
Peter A. Hitchcock ◽  
Desmond K.K. Hui
Keyword(s):  
Wind Tunnel ◽  
Large Eddy Simulation ◽  
Complex Terrain ◽  
Eddy Simulation ◽  
Hill Slope ◽  
Large Eddy ◽  
Wind Tunnel Study

Large Eddy Simulation of Wind Loads on a Low-Rise Structure and Comparison with Wind Tunnel Results

2012 ◽  
Vol 152-154 ◽  
pp. 1806-1813 ◽  
Author(s):  
Isam Janajreh ◽  
Simiu Emil
Keyword(s):  
Wind Tunnel ◽  
Large Eddy Simulation ◽  
Pressure Coefficients ◽  
Eddy Simulation ◽  
Gable Roof ◽  
Second Moments ◽  
Large Eddy ◽  
Wind Tunnel Measurements ◽  
Time Histories ◽  
The University

This work presents estimates of time histories of pressure coefficients at several taps on the roof of a 1/200 model of a 200 x 100 x 20 ft low-rise building with a 1/24 slope gable roof building. The estimates were obtained by large eddy simulation (LES). The first and second moments as well as peaks for the time histories are compared with those obtained in boundary layer wind-tunnel measurements at the University of Western Ontario. It is noted that the computation times required to obtain records of length comparable to wind tunnel records are at present prohibitively large.

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