8d4ad0438d
- provides a simple means of defining/modifying fields. For example,
```
<name1>
{
type exprField;
libs (fieldFunctionObjects);
field pTotal;
expression "p + 0.5*(rho*magSqr(U))";
dimensions [ Pa ];
}
```
It is is also possible to modify an existing field.
For example, to modify the previous one.
```
<name2>
{
type exprField;
libs (fieldFunctionObjects);
field pTotal;
action modify;
// Static pressure only in these regions
fieldMask
#{
(mag(pos()) < 0.05) && (pos().y() > 0)
|| cellZone(inlet)
#};
expression "p";
}
```
To use as a simple post-process calculator, simply avoid storing the
result and only generate on write:
```
<name2>
{
store false;
executionControl none;
writeControl writeTime;
...
}
```
66 lines
1.3 KiB
C++
66 lines
1.3 KiB
C++
// -*- C++ -*-
|
|
|
|
// Create additional volume fields (for sampling)
|
|
derivedFields
|
|
{
|
|
// Mandatory entries
|
|
type derivedFields;
|
|
libs (fieldFunctionObjects);
|
|
derived (rhoU pTotal);
|
|
|
|
// Optional entries
|
|
rhoRef 1.25;
|
|
|
|
// Optional (inherited) entries
|
|
region region0;
|
|
enabled true;
|
|
log true;
|
|
timeStart 0;
|
|
timeEnd 10000;
|
|
executeControl timeStep;
|
|
executeInterval 1;
|
|
writeControl none;
|
|
writeInterval -1;
|
|
}
|
|
|
|
|
|
exprField1
|
|
{
|
|
// Mandatory entries
|
|
type exprField;
|
|
libs (fieldFunctionObjects);
|
|
field pTot;
|
|
/// action new;
|
|
///autowrite false;
|
|
///store true;
|
|
useNamePrefix false;
|
|
|
|
// Use expression to define total pressure
|
|
|
|
executeControl timeStep;
|
|
writeControl none;
|
|
|
|
expression "p + 0.5*(rho * magSqr(U))";
|
|
dimensions [ Pa ];
|
|
}
|
|
|
|
|
|
exprField1.mod0
|
|
{
|
|
// Mandatory entries
|
|
type exprField;
|
|
libs (fieldFunctionObjects);
|
|
field pTot;
|
|
action modify;
|
|
|
|
executeControl timeStep;
|
|
writeControl writeTime;
|
|
|
|
// Static pressure only in these regions
|
|
fieldMask "(mag(pos()) < 0.05) && (pos().y() > 0) || cellZone(inlet)";
|
|
expression "p";
|
|
}
|
|
|
|
|
|
// ************************************************************************* //
|