Resolving Turbulent Wakes

2002 ◽  
Author(s):  
Stephen A. Jordan
Keyword(s):  
Circular Cylinder ◽  
Large Eddy Simulation ◽  
Experimental Evidence ◽  
Numerical Stability ◽  
Compact Schemes ◽  
Eddy Simulation ◽  
Turbulent Wakes ◽  
Large Eddy ◽  
Convective Derivative

Accurate resolution of turbulent wakes is a formidable task. Herein, we challenge this task by testing several compact schemes for approximating the convective derivative of the direct numerical and large-eddy simulation (DNS and LES) methodologies. The stencils house the needed resolution efficiency and numerical stability characteristics to properly resolve turbulent wakes while concurrently maintaining convergent solutions. Turbulent wakes of the circular cylinder are computed for Re = 1260 and 3900 with the results verified by the experimental evidence.

scholarly journals Large-eddy simulation of shallow turbulent wakes behind a conical island

2017 ◽  
Vol 29 (12) ◽  
pp. 126601 ◽  
Author(s):  
Pablo Ouro ◽  
Catherine A. M. E. Wilson ◽  
Paul Evans ◽  
Athanasios Angeloudis
Keyword(s):  
Large Eddy Simulation ◽  
Eddy Simulation ◽  
Turbulent Wakes ◽  
Large Eddy

scholarly journals EFFECT OF THE SPANWISE DISCRETISATION ON TURBULENT FLOW PAST A CIRCULAR CYLINDER

2021 ◽  
Vol 158 (A1) ◽  
Author(s):  
S Kim ◽  
P A Wilson ◽  
Z Chen
Keyword(s):  
Reynolds Number ◽  
Circular Cylinder ◽  
Flow Field ◽  
Large Eddy Simulation ◽  
Turbulent Flow ◽  
Three Dimensional ◽  
Scale Model ◽  
Spatial Density ◽  
Eddy Simulation ◽  
Large Eddy

The effect of the spanwise discretisation on numerical calculations of the turbulent flow around a circular cylinder is systematically assessed at a subcritical Reynolds number of 10000 in the frame of three-dimensional large-eddy simulation. The eddy-viscosity k-equation subgrid scale model is implemented to evaluate unsteady turbulent flow field. Large-eddy simulation is known to be a reliable method to resolve such a challenging flow field, however, the high computational efforts restrict to low Reynolds number flow or two-dimensional calculations. Therefore, minimum spatial density in the spanwise direction or cylinder axis direction needs to be carefully evaluated in order to reduce high computational resources. In the present study, the influence of the spanwise resolutions to satisfactorily represent three- dimensional complex flow features is discussed in detail and minimum spatial density for high Reynolds flow is suggested.

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