@Article{CiCP-20-2,
author = {},
title = {An Improved Second-Order Finite-Volume Algorithm for Detached-Eddy Simulation Based on Hybrid Grids},
journal = {Communications in Computational Physics},
year = {2016},
volume = {20},
number = {2},
pages = {459--485},
abstract = {<p style="text-align: justify;">A hybrid grid based second-order finite volume algorithm has been developed
for Detached-Eddy Simulation (DES) of turbulent flows. To alleviate the
effect caused by the numerical dissipation of the commonly used second order upwind
schemes in implementing DES with unstructured computational fluid dynamics
(CFD) algorithms, an improved second-order hybrid scheme is established through
modifying the dissipation term of the standard Roe&#39;s flux-difference splitting scheme
and the numerical dissipation of the scheme can be self-adapted according to the DES
flow field information. By Fourier analysis, the dissipative and dispersive features of
the new scheme are discussed. To validate the numerical method, DES formulations
based on the two most popular background turbulence models, namely, the one equation
Spalart-Allmaras (SA) turbulence model and the two equation k−ω Shear Stress
Transport model (SST), have been calibrated and tested with three typical numerical
examples (decay of isotropic turbulence, NACA0021 airfoil at 60<sup>◦&nbsp;</sup>incidence and 65<sup>◦&nbsp;</sup>swept delta wing). Computational results indicate that the issue of numerical dissipation
in implementing DES can be alleviated with the hybrid scheme, the resolution
for turbulence structures is significantly improved and the corresponding solutions
match the experimental data better. The results demonstrate the potentiality of the
present DES solver for complex geometries.</p>},
issn = {1991-7120},
doi = {https://doi.org/10.4208/cicp.190915.240216a},
url = {https://global-sci.com/article/80205/an-improved-second-order-finite-volume-algorithm-for-detached-eddy-simulation-based-on-hybrid-grids}
}