∇

Description

The turbulentIntensityKineticEnergyInlet is a boundary condition that provides a turbulent kinetic energy condition, based on user-supplied turbulence intensity, defined as a fraction of the mean velocity:

\[k_p = 1.5 (I |\u|)^2\]

where:

Property Description
\(k_p\) Kinetic energy at the patch
\(I\) Turbulence intensity
\(\u\) Velocity field

In the event of reverse flow, a zero-gradient condition is applied.

Usage

The condition requires entries in both the boundary and field files.

Boundary file 

<patchName>
{
    type             patch;
    ...
}

Field file 

<patchName>
{
    // Mandatory entries
    type             turbulentIntensityKineticEnergyInlet;
    intensity        <scalar>;

    // Optional entries
    U               <word>;

    // Inherited entries
    ...
}

where:

Property Description Type Required Default
type Type name: turbulentIntensityKineticEnergyInlet word yes -
intensity Fraction of mean field [0-1] scalar yes -
U Name of velocity field word no U

The inherited entries are elaborated in:

Further information

Tutorial:

Source code:

API:

History:

  • Introduced in version 1.5