WVAdaptiveViscosity

Adaptive small-scale damping

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Declaration

WVAdaptiveViscosity < WVForcing

Overview

The damping is a simple Laplacian, but with a spectral vanishing viscosity (SVV) operator applied that prevents any damping below a cutoff wavenumber, adapted to the current fluid velocity. The SVV operator adjusts the wavenumbers being damped depending on whether anti-aliasing is applied.

Topics

• Other
  • F0_damp
  • Fpm_damp
  • WVAdaptiveViscosity initialize the WVNonlinearFlux nonlinear flux
  • buildDampingOperator Builds the damping operator
  • classRequiredPropertyNames Returns the required property names for the class
  • dampingTimeScale Computes the damping time scale
  • k_damp wavenumber at which the significant scale damping starts.
  • k_no_damp wavenumber below which there is zero damping
  • spectralVanishingViscosityFilter Builds the spectral vanishing viscosity operator

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