Scopus
A dynamic forcing scheme incorporating backscatter for hybrid simulation
Physics of Fluids · Temmuz 2014
Makale Bilgileri
DergiPhysics of Fluids
Yayın TarihiTemmuz 2014
Cilt / Sayfa26
Scopus ID2-s2.0-84937000819
Özet
In this paper, a dynamic forcing scheme incorporating backscatter is proposed in order to remove the artificial buffer layer in a hybrid Reynolds-averaged Navier-Stokes (RANS)/large-eddy simulation (LES) approach. In contrast to previous forcing techniques, the proposed forcing is determined dynamically from the flow field itself, and does not require any extraction of turbulent fields from reference direct numerical simulation (DNS) or high-resolution LES databases. Transport equations for the resolved turbulent stresses and kinetic energy are introduced to investigate the effects of dynamic forcing on reduction of the thickness and impact of the artificial buffer layer. The proposed forcing model has been tested in the context of turbulent channel flows with Reynolds numbers Reτ = 650 and 1020 (based on the wall friction velocity and half channel height). In order to validate the hybrid RANS/LES approach, flow statistics obtained from the simulations have been thoroughly compared against the available DNS data.
Yazarlar (2)
1
Qian Qiu Xun
2
Bing Chen Wang
Kurumlar
University of Manitoba
Winnipeg Canada
Metrikler
3
Atıf
2
Yazar