Publisher : The Korean Society for Aeronautical & Space Sciences
DOI : 10.5139/IJASS.2010.11.1.041
Title & Authors
Numerical Comparisons Between URANS and Hybrid RANS/LES at a High Reynolds Number Flow Using Unstructured Meshes You, Ju-Yeol; Kwon, Oh-Joon;
In the present study, the turbulent flow fields around a circular cylinder at were investigated based on an unstructured mesh technique, and the comparisons between URANS(S-A, SST) and hybrid RANS/LES(DES, SAS) methods for the simulation of high Reynolds number flow have been conducted. For this purpose, unsteady characteristics of vortex shedding and time-averaged quantities were compared. A quasi-steady solution-adaptive mesh refinement was also made for the URANS and hybrid RANS/LES approaches. The results showed that the simple changes in the turbulent length scale or source term of turbulent models made the flow fields less dissipative and more realistic in hybrid RANS/LES methods than the URANS approaches.
A new formulation of scale-adaptive simulation approach to predict complex wall-bounded shear flows, Journal of Turbulence, 2014, 15, 10, 629
Nichols, R.H., 2005, “Comparison of Hybrid RANS/LES Turbulence Models on a Circular Cylinder at High Reynolds Number”, 43rd AIAA Aerospace Science Meeting and Exhibit, Reno, AIAA 2005-498.
Krishnan, V. and Squires, K.D., 2006, “Prediction of the Flow around a Circular Cylinder at High Reynolds Number”, 44th AIAA Aerospace Science Meeting and Exhibit, Reno, AIAA 2006-901.
Ong, M.C., Utnes, T., Holmedal, L.E., Myrhaug, D. and Pettersen, B., 2009, “Numerical Simulation of Flow around a Smooth Circular Cylinder at Very High Reynolds Numbers”, Marine Structures, Vol.22, pp. 142-153.
ROSHKO, A., 1961, “Experiments of the Flow Past a Circular Cylinder at Very High Reynolds Number”, J. Fluid Mechanics, Vol.10, pp. 345-356.
ACHENBACH, M., 1968, “Distribution of Local Pressure and Skin Friction around a Circular Cylinder in Cross-Flow up to Re=5 x 106,” J. Fluid Mechanics, Vol.34, pp. 625-639.
Spalart, P.R. and Allmaras, S.R., 1992, “A One-Equation Turbulence Model for Aerodynamic Flows”, 30th AIAA Aerospace Science Meeting and Exhibit, Reno, AIAA 1992-0439.
Spalart, P.R, 2001, “Young-Person's Guide to Detached-Eddy Simulation Grids,” NASA CR-2001-211032.
Menter, F.R., 1994, “Two-Equation Eddy Viscosity Turbulence Models for Engineering Applications”, AIAA J., Vol.32, pp. 1598-1605.
Menter, F.R. and Egorov, Y., 2005, “A Scale-Adaptive Simulation Model using Two-Equation Models”, 43rd AIAA Aerospace Science Meeting and Exhibit, Reno, AIAA 2005-1095.