Large-Eddy Simulation of Square Jet

Abstract

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).

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 2001
Accession Number
ADP013661

Entities

People

  • D. D. Knight
  • Xin Zhou

Organizations

  • Rutgers University Department of Mechanical and Aerospace Engineering

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boundary Layer
  • Computational Fluid Dynamics
  • Computational Science
  • Equations
  • Fluid Dynamics
  • Fluid Flow
  • Large Eddy Simulation
  • Mach Number
  • Mixing
  • Reynolds Number
  • Simulations
  • Three Dimensional
  • Turbulence
  • Turbulent Flow
  • Turbulent Mixing
  • Viscous Flow

Fields of Study

  • Physics

Readers

  • Computational Fluid Dynamics (CFD)
  • Fluid Mechanics and Fluid Dynamics.
  • Linear Algebra