Description🔗
The derivedFields
function object computes computes two predefined
derived fields, i.e. rhoU
, and pTotal
, where the defined fields are
hard-coded as follows:
- \(rhoU\)
- \[\rho \u\]
- \(pTotal\)
- \[p + 0.5 \rho \mag{\u}^2\]
Operands🔗
Operand | Type | Location |
---|---|---|
input | vol<Type>Field |
$FOAM_CASE/<time>/<inpField> |
output file | - | - |
output field | vol<Type>Field |
$FOAM_CASE/<time>/<outField> |
where <Type>=Scalar/Vector/SphericalTensor/SymmTensor/Tensor
.
Usage🔗
Example of the derivedFields
function object
by using functions
sub-dictionary in system/controlDict
file:
derivedFields1
{
// Mandatory entries (unmodifiable)
type derivedFields;
libs (fieldFunctionObjects);
// Mandatory entries (runtime modifiable)
derived (rhoU pTotal);
// Optional entries (runtime modifiable)
rhoRef 1.0;
// 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: derivedFields | word | yes | - |
libs | Library name: fieldFunctionObjects | word | yes | - |
derived | Names of operand fields (rhoU|pTotal) | word | yes | - |
rhoRef | Reference density for incompressible flows | scalar | no | 1.0 |
The inherited entries are elaborated in:
Usage by the postProcess
utility is not available.
Further information🔗
Tutorial:
- $FOAM_TUTORIALS/compressible/rhoSimpleFoam/gasMixing/injectorPipe
- $FOAM_TUTORIALS/incompressible/simpleFoam/squareBend
Source code:
API:
History:
- Introduced in version v1906