TY - JOUR

T1 - Experiences with two detached eddy simulation approaches through use of a high-order finite volume solver

AU - Cengiz, Kenan

AU - Özyörük, Yusuf

N1 - Funding Information: information TÜBİTAK, 1001/112M106Funding by TÜBİTAK (the Scientific and Technological Research Council of Turkey) is gratefully acknowledged under the 1001 program (grant no.112M106). The authors are thankful to METU Center for Wind Energy (RÜZGEM) as well as TUBİTAK ULAKBİM High Performance and Grid Computing Center (TRUBA resources) for HPC the resources provided. The authors also thank Wybe Rozema for supplying the LES data and Prof. Young J. Moon for his valuable advice. Funding Information: Funding by TÜBİTAK (the Scientific and Technological Research Council of Turkey) is gratefully acknowledged under the 1001 program (grant no.112M106). The authors are thankful to METU Center for Wind Energy (RÜZGEM) as well as TUBİTAK ULAKBİM High Performance and Grid Computing Center (TRUBA resources) for HPC the resources provided. The authors also thank Wybe Rozema for supplying the LES data and Prof. Young J. Moon for his valuable advice. Publisher Copyright: © 2020 John Wiley & Sons, Ltd.

PY - 2020/8/1

Y1 - 2020/8/1

N2 - In the present study, two advanced detached eddy simulation (DES) approaches, shear-layer-adapted delayed DES and zonal DES in mode II, which are known to help transition from RANS to LES mode, are employed in various flow problems in conjunction with a high-order finite volume solver. The numerical scheme, being only applicable on structured grids, has low-dissipation and low-dispersion features. Such features benefit mostly in the LES mode, minimizing the interference of numerical diffusion with subgrid eddy viscosity. First, corresponding subgrid models are validated via decaying homogeneous turbulence benchmark case. Then, a channel flow problem is chosen to examine these models in attached flow situations. Finally, flow around an airfoil at low Reynolds number is solved using the shear-layer-adapted delayed DES approach only, in an aim to obtain trailing-edge noise spectrum at an observer location. Despite some log-layer mismatch over turbulent boundary layers, which is typical of most DES methods, the combined application of high-resolution numerical method and advanced DES approaches, which are implemented on a stabilized Spalart-Allmaras turbulence model, shows merit in resolution of turbulence in regions of interest.

AB - In the present study, two advanced detached eddy simulation (DES) approaches, shear-layer-adapted delayed DES and zonal DES in mode II, which are known to help transition from RANS to LES mode, are employed in various flow problems in conjunction with a high-order finite volume solver. The numerical scheme, being only applicable on structured grids, has low-dissipation and low-dispersion features. Such features benefit mostly in the LES mode, minimizing the interference of numerical diffusion with subgrid eddy viscosity. First, corresponding subgrid models are validated via decaying homogeneous turbulence benchmark case. Then, a channel flow problem is chosen to examine these models in attached flow situations. Finally, flow around an airfoil at low Reynolds number is solved using the shear-layer-adapted delayed DES approach only, in an aim to obtain trailing-edge noise spectrum at an observer location. Despite some log-layer mismatch over turbulent boundary layers, which is typical of most DES methods, the combined application of high-resolution numerical method and advanced DES approaches, which are implemented on a stabilized Spalart-Allmaras turbulence model, shows merit in resolution of turbulence in regions of interest.

KW - detached-eddy simulation

KW - low dispersion

KW - low dissipation

KW - shear-layer-adaptive DDES

KW - ZDES

UR - http://www.scopus.com/inward/record.url?scp=85078884972&partnerID=8YFLogxK

U2 - 10.1002/fld.4811

DO - 10.1002/fld.4811

M3 - Article

AN - SCOPUS:85078884972

VL - 92

SP - 899

EP - 921

JO - International Journal for Numerical Methods in Fluids

JF - International Journal for Numerical Methods in Fluids

SN - 0271-2091

IS - 8

ER -