Large-Eddy Simulation of Square Jet
RUTGERS - THE STATE UNIV NEW BRUNSWICKNJ DEPT OF MECHANICAL AND AEROSPACE ENGINEERING
Pagination or Media Count:
We present a large-eddy simulation LES of the near-field of a low-Mach number square jet. The filtered governing equations of compressible flows are solved using the approximate Riemann solver of Roe for the convective fluxes and an application of Gauss theorem for the viscous fluxes on an unstructured grid of tetrahedral cells. The LES is performed with the Monotone Integrated LES MILES for the subgrid scale model. A square jet at a Mach number of 0.3 and a Reynolds number of 3,200 is simulated. Axis-rotation occurs and is caused by Blot-Savart self-induction associated with nonuniform shear-layer curvature at the exit. Complex vortex topologies and interaction between vortex rings and rib vortices are observed downstream. Mean properties are in good agreement with the Direct Numerical Simulation DNS results of Grinstein et al. 1995.
- Fluid Mechanics