The turbulentMixingLengthFrequencyInlet is a boundary condition that provides a turbulence specific dissipation, omega inlet condition based on a specified mixing length. The patch values are calculated using:

\[\omega_p = \frac{k^{0.5}}{C_{\mu}^{0.25} L}\]


Property Description
\(\omega_p\) Patch omega values [1/s]
\(C_\mu\) Empirical model constant retrived from turbulence model
\(k\) Turbulent kinetic energy [m^2/s^2]
\(L\) Mixing length scale [m]


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

Boundary file

    type            patch;

Field file

    // Mandatory entries
    type            turbulentMixingLengthFrequencyInlet;
    mixingLength    <scalar>;

    // Optional entries
    k               <word>;
    phi             <word>;

    // Inherited entries


Property Description Type Required Default
type Type name: turbulentMixingLengthFrequencyInlet word yes -
mixingLength Mixing length scale [m] scalar yes -
phi Name of flux field word no phi
k Name of turbulent kinetic energy field word no k

The inherited entries are elaborated in:

  • inletOutletFvPatchFields.H

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

Further information


Source code:



  • Introduced in version 2.2.2