High Re Separated Flow Solutions Using the Navier-Stokes and Approximate Equations,

Abstract

The present study is concerned with the numerical simulation of high Reynolds number weakly separated steady laminar flows. It is shown that a 'well designed' code can solve the complete Navier-Stokes (NS) equations and the 'more suitable?' parabolized Navier-Stokes (PNS) equations with the same convergence rate, so that solving the full NS equations is recommended when dealing with a new problem. Furthermore, solutions to the classical boundary layer equations in their vorticity-stream function form are obtained, which are regular thru the separation point, i.e, do not encounter the Goldstein singularity at separation. Finally, for a very typical high Reynolds number weakly separated flow, it is shown that, in the presence of non negligible skewness in the body oriented computational grid, a PNS-type approximation still provides very reliable solutions, whereas an interacting boundary layer-type model is plagued by severe errors. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1985
Accession Number
ADA152252

Entities

People

  • M. Napolitano

Organizations

  • Yale University

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Boundary Layer
  • Boundary Layer Flow
  • Channel Flow
  • Computational Fluid Dynamics
  • Computational Science
  • Computer Science
  • Coordinate Systems
  • Equations
  • Flow
  • Flow Fields
  • Fluid Dynamics
  • Fluid Mechanics
  • Geometry
  • Inviscid Flow
  • Pressure Gradients
  • Reynolds Number
  • Skin Friction

Fields of Study

  • Physics

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Fluid Mechanics and Fluid Dynamics.