Description🔗
The turbulenceFields
function object
computes various turbulence-related quantities that are not typically
output during calculations, including:
-
k
: Turbulent kinetic energy -
epsilon
: Turbulent kinetic energy dissipation rate -
omega
: Specific dissipation rate -
R
: Reynolds stress tensor -
L
: Integral-length/Mixing-length scale -
I
: Turbulence intensity -
nuTilda
: Modified turbulent viscosity
Additional field selections for incompressible cases:
-
nut
: Turbulent (edy) kinematic viscosity -
nuEff
: Effective kinematic viscosity (laminar + turbulent contributions) -
devReff
: Deviatoric stress tensor
Additional field selections for compressible cases:
-
mut
: Turbulent (eddy) dynamic viscosity -
muEff
: Effective dynamic viscosity (laminar + turbulent contributions) -
alphat
: Thermal eddy diffusivity -
alphaEff
: Effective eddy thermal diffusivity -
devRhoReff
: Deviatoric stress tensor
These fields are stored on the mesh database for further post-processing, and written as regular volume fields at write intervals.
Operands🔗
Operand | Type | Location |
---|---|---|
input | - | - |
output file | - | - |
output field | vol<Type>Field |
$FOAM_CASE/<time>/<outField> |
where <Type>=Scalar/Vector/SphericalTensor/SymmTensor/Tensor
.
Usage🔗
Example of the turbulenceFields
function object
by using functions
sub-dictionary in system/controlDict
file:
turbulenceFields1
{
// Mandatory entries (unmodifiable)
type turbulenceFields;
libs (fieldFunctionObjects);
// Mandatory entries (runtime modifiable)
// Either field or fields entries
fields (R devRhoReff);
field R;
// Optional (inherited) entries
region region0;
enabled true;
log true;
timeStart 0;
timeEnd 1000;
executeControl timeStep;
executeInterval 1;
writeControl timeStep;
writeInterval 1;
}
where the entries mean:
Property | Description | Type | Required | Default |
---|---|---|---|---|
type | Type name: turbulenceFields | word | yes | - |
libs | Library name: fieldFunctionObjects | word | yes | - |
fields | Names of fields to store (see below) | wordList | yes | - |
field | Name of a field to store (see below) | word | yes | - |
The inherited entries are elaborated in:
Example by using the postProcess
utility:
<solver> -postProcess -func turbulenceFields
Sample output🔗
Fields stored on the mesh database with the prefix turbulenceProperties:
, e.g.
turbulenceProperties:mut
turbulenceProperties:R
turbulenceProperties:devRhoReff
and written to the standard time directories according to the writeControl setting.
Further information🔗
Tutorial:
Source code:
API:
History:
- Introduced in version v1606+