Applications of a Highly Efficient Numerical Method for Overset-Mesh Moving Body Problems

Abstract

Several improvements have been incorporated into the XAIR overset-mesh flow solver which substantially improve the capability of the code to perform time-accurate solutions. These improvements include implementing an upwind flux formulation combined with a quasi-Newton relaxation time-stepping strategy. The code includes a very stable k-e turbulence model which can be used with or without wall function boundary conditions. Results are presented for two moving body cases and two unsteady flows. The new code has demonstrated reductions of CPU times over traditional alternating direction implicit (ADI) methods by factors of 10 for inviscid flows and by orders of magnitude for viscous flows.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1997
Accession Number
ADA346068

Entities

People

  • R. H. Nichols
  • R. W. Tramel

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aerodynamic Characteristics
  • Aeroelasticity
  • Boundaries
  • Boundary Layer
  • Computational Fluid Dynamics
  • Flow
  • Flow Visualization
  • Fluid Dynamics
  • Fluid Flow
  • Mach Number
  • Mechanical Properties
  • Physics Laboratories
  • Reynolds Number
  • Strouhal Number
  • Turbulence
  • Unsteady Flow
  • Viscous Flow

Fields of Study

  • Physics

Readers

  • Computational Fluid Dynamics (CFD)
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)