Calibration of a new very large eddy simulation (VLES) methodology for turbulent flow simulation
Artikel i vetenskaplig tidskrift, 2012

Following the idea of Speziale's Very Large Eddy Simulation (VLES) method, a new unified hybrid simulation approach was proposed which can change seamlessly from RANS (Reynolds-Averaged Navier-Stokes) to LES (Large Eddy Simulation) method depending on the numerical resolution. The model constants were calibrated in accordance with other hybrid methods. Besides being able to approach the two limits of RANS and LES, the new model also provides a proper VLES mode between the two limits, and thus can be used for a wide range of mesh resolutions. Also RANS simulation can be recovered near the wall which is similar to the Detached Eddy Simulation (DES) concept. This new methodology was implemented into Wilcox's k-omega model and applications were conducted for fully developed turbulent channel flow at Re (tau) = 395 and turbulent flow past a square cylinder at Re = 22000. Results were compared with LES predictions and other studies. The new method is found to be quite efficient in resolving large flow structures, and can predict satisfactory results on relative coarse mesh.

hybrid RANS-LES method

square cylinder

wake

flow past a square

Very Large Eddy Simulation (VLES)

channel flow

rans

Författare

Xingsi Han

Chalmers, Tillämpad mekanik, Strömningslära

T. H. Ye

University of Science and Technology of China

Y. L. Chen

University of Science and Technology of China

Science China: Physics, Mechanics and Astronomy

1674-7348 (ISSN)

Vol. 55 10 1905-1914

Ämneskategorier

Strömningsmekanik och akustik

DOI

10.1007/s11433-012-4886-3

Mer information

Skapat

2017-10-06