Computational Fluid Dynamics Laboratory
DNS/LES of Homogeneous Turbulence
We are currently conducting 3D DNS and LES of homogeneous turbulence to explore new
SGS turbulence models. The code solves the incompressible Navier-Stokes equations
using a traditional Fourier pseudospectral method featuring dealiasing by either
the 3/2 rule or the phase shift rule. The code uses a unique parallel 3D FFT library
that has allowed for scaling on up to 16,000 processors of the IBM BG/L
at IBM's Watson's Laboratory. LES of the high-Reynolds number expermiental dataset
from Kang et al. (2003) is currently being conducted. The focus is on the use of
regularization based models. The code also features various forcing strategies and
also scalar mixing to study SGS mixing models.
We are currently conducting simulations of both homogeneous turbulence and the Taylor-Green
vortex to study various regularization based SGS models such as the Leray-alpha model.
Below are baseline TKE results showing LES with Smagorinsky model compared to
the experimental data of Kang et al. (2003).
Below is sample from LES of Taylor-Green vortex. Scroll down for all images.
