Large Eddy Simulation Using Complete Fourth Order Difference Method and Vorticity-Vector Potential Formulation in Generalized Coordinates

Abstract

The vorticity-vector potential formulation and the fourth-order difference method are combined with LES with dynamic subgrid scale model. The new sharp cut off filtering is devised, which has the fourth order accuracy. The present computational method is validated for the simulation of transition in channel. The channel flow with two rows of transverse riblet is computed by the present method and is shown that the drag reduction is attained after the turbulet field developes fully on the riblet surface. It is also found that the transverse riblet has the same effect as the suction.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 2001
Accession Number
ADP013643

Entities

People

  • Hiroshi Tokunaga
  • Kazunori Okuda

Organizations

  • Kyoto Institute of Technology

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Channel Flow
  • Computational Fluid Dynamics
  • Computational Science
  • Coordinate Systems
  • Differential Equations
  • Drag
  • Drag Reduction
  • Equations
  • Flow
  • Fluid Dynamics
  • Fluid Flow
  • Friction
  • Large Eddy Simulation
  • Poisson Equation
  • Scale Models
  • Simulations
  • Skin Friction

Fields of Study

  • Physics

Readers

  • Calculus or Mathematical Analysis
  • Computational Fluid Dynamics (CFD)
  • Fluid Mechanics and Fluid Dynamics.