atmNutSource

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:

• fvOption
  • cellSetOption

Further information

Source code

• atmNutSource

History: Introduced in version v2006