Numerical Efficiency of Explicit and Implicit Methods with Multigrid for Large Eddy Simulation

Abstract

In this paper the accuracy and efficiency of a finite-volume multigrid solver for Large Eddy Simulation (LES) is investigated. The spatial discretization method employed is a second-order accurate central differencing scheme. For time discretization of the momentum equations the implicit second-order Crank-Nicolson method and the explicit second-order Adams-Bashforth method are considered. The influences of the two time discretizations, choice of grid size and time-step size and multigrid performance on the numerical accuracy and computational efficiency are discussed.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 2001
Accession Number
ADP013660

Entities

People

  • M. Schaefer
  • S. Ertem-mueller

Organizations

  • Technical University of Darmstadt

Tags

DTIC Thesaurus Topics

  • Accuracy
  • Cartesian Coordinates
  • Channel Flow
  • Computational Fluid Dynamics
  • Computations
  • Efficiency
  • Equations
  • Flow
  • Grids
  • High Acceleration
  • Large Eddy Simulation
  • Linear Systems
  • Mechanical Engineering
  • Models
  • Momentum
  • Navier Stokes Equations
  • Simulations

Readers

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