Large Eddy Simulation of Turbulent Flow Over an Airfoil Using Both Structured and Unstructured Grids

Abstract

This report describes the application of Large Eddy Simulations (LES) to turbulent flow over an airfoil. Two different approaches have been used, a second-order finite-difference solver on structured grid and a finite-element solver on unstructured grid. Results are presented for the flow around a NACA 4412 airfoil at maximum lift. The diversity of flow characteristics encountered in this flow include laminar, transitional and turbulent boundary layers, flow separation, unstable free shear layers and a wake. while Reynolds-averaged Navier-Stokes simulations (RANS) have had some success when tuned to flows dominated by one such flow characteristic, this variety of flow features taxes the presently available RANS models and presents an excellent opportunity to validate the utility of the dynamic SGS model for LES. Work has also been conducted on high order methods, both for the unstructured and the structured approach.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1998
Accession Number
ADA343850

Entities

People

  • Parviz Moin

Organizations

  • Stanford University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boundary Layer
  • Computational Fluid Dynamics
  • Flow
  • Flow Fields
  • Fluid Dynamics
  • Fluid Flow
  • Large Eddy Simulation
  • Layers
  • Pressure Distribution
  • Pressure Gradients
  • Reynolds Number
  • Simulations
  • Three Dimensional
  • Turbulent Flow
  • Turbulent Mixing
  • Two Dimensional
  • Viscous Flow

Fields of Study

  • Physics

Readers

  • Computational Modeling and Simulation
  • Fluid Mechanics and Fluid Dynamics.