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Properties

  • The atmNutSource adds/subtracts a given artificial turbulent viscosity field to/from nut for atmospheric boundary layer modelling.
  • The atmNutSource can be applied on any RAS turbulence model.
  • The atmNutSource inherits the traits of the fvOption, and cellSetOption.

Corrections applied to:

nut
Turbulent viscosity [m\(^2\)/s]

Required fields:

nut
Turbulent viscosity [m\(^2\)/s]
artNut
Artificial turbulent viscosity [m\(^2\)/s]

Model equations

The model expression:

\[\nu_t += \nu_{t_{art}}\]

Where:

\(\nu_t\)
Turbulent viscosity [m2/s]
\(\nu_{t_{art}}\)
Artificial turbulent viscosity [m2/s]

Usage

Example of the fvOptions specification using constant/fvOptions file:

atmNutSource1
{
    // Mandatory entries (unmodifiable)
    type                  atmNutSource;

    atmNutSourceCoeffs
    {
        // Mandatory (inherited) entries (unmodifiable)
        selectionMode    all;

        // Optional entries (unmodifiable)
        nut              artNut;
    }

    // Optional (inherited) entries
    ...
}

where the entries mean:

Property Description Type Required Default
type Type name: atmNutSource word yes -
nut Field name of artificial nut word no artNut

The inherited entries are elaborated in:

Further information

Source code

History:

  • Introduced in version v2006