ENH: Copying alphatLiquid value to alphatVapour for boiling regimes.
When using correlations for boiling regimes the phases next to the
wall are not relevant to these. Therefore the alphat is copied
accordingly from the alphat for liquid.
Only in the sub-cooling RPI model the partition of heat flux
between vapour and liquid is considered.
Calculates propeller performance and wake field properties.
Controlled by executeControl:
- Propeller performance
- Thrust coefficient, Kt
- Torque coefficient, 10*Kq
- Advance coefficient, J
- Open water efficiency, etaO
- Written to postProcessing/<name>/<time>/propellerPerformance.dat
Controlled by writeControl:
- Wake field text file
- Wake: 1 - UzMean/URef
- Velocity in cylindrical coordinates at xyz locations
- Written to postProcessing/<name>/<time>/wake.dat
- Axial wake field text file
- 1 - Uz/URef at r/R and angle
- Written to postProcessing/<name>/<time>/axialWake.dat
- Velocity surface
- Written to postProcessing/<name>/surfaces/time>/disk.<fileType>
Usage
Example of function object specification:
\verbatim
propellerInfo1
{
type propellerInfo;
libs (forces);
writeControl writeTime;
patches ("propeller.*");
URef 5; // Function1 type; 'constant' form shown here
rho rhoInf; // incompressible
rhoInf 1.2;
// Optionally write propeller performance data
writePropellerPerformance yes;
// Propeller data:
// Radius
radius 0.1;
rotationMode specified; // specified | MRF
// rotationMode = specified:
origin (0 -0.1 0);
n 25.15;
axis (0 1 0);
// Optional reference direction for angle (alpha) = 0
alphaAxis (1 0 0);
//// rotationMode = mrf
//// MRF MRFZoneName;
//// (origin, n and axis retrieved from MRF model)
// Optionally write wake text files
// Note: controlled by writeControl
writeWakeFields yes;
// Sample plane (disk) properties
// Note: controlled by writeControl
sampleDisk
{
surfaceWriter vtk;
r1 0.05;
r2 0.2;
nTheta 36;
nRadial 10;
interpolationScheme cellPoint;
errorOnPointNotFound false;
}
}
\endverbatim
Where the entries comprise:
\table
Property | Description | Required | Deflt value
type | Type name: propellerInfo | yes |
log | Write to standard output | no | no
patches | Patches included in the forces calculation | yes |
p | Pressure field name | no | p
U | Velocity field name | no | U
rho | Density field name | no | rho
URef | Reference velocity | yes |
rotationMode | Rotation mode (see below) | yes |
origin | Sample disk centre | no* |
n | Revolutions per second | no* |
axis | Propeller axis | no* |
alphaAxis | Axis that defines alpha=0 dir | no |
MRF | Name of MRF zone | no* |
originOffset | Origin offset for MRF mode | no | (0 0 0)
writePropellerPerformance| Write propeller performance text file | yes |
writeWakeFields | Write wake field text files | yes |
surfaceWriter | Sample disk surface writer | no* |
r1 | Sample disk inner radius | no | 0
r2 | Sample disk outer radius | no* |
nTheta | Divisions in theta direction | no* |
nRadial | Divisions in radial direction | no* |
interpolationScheme | Sampling interpolation scheme | no* | cell
\endtable
Note
- URef is a scalar Function1 type, i.e. supports constant, table, lookup values
- rotationMode is used to set the origin, axis and revolutions per second
- if set to 'specified' all 3 entries are required
- note: origin is the sample disk origin
- if set to 'MRF' only the MRF entry is required
- to move the sample disk away from the MRF origin, use the originOffset
- if writePropellerPerformance is set to on|true:
- propellerPerformance text file will be written
- if writeWakeFields is set to on|true:
- wake and axialWake text files will be written
- if the surfaceWriter entry is set, the sample disk surface will be written
- extents set according to the r1 and r2 entries
- discretised according to the nTheta and nRadial entries
- 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;
...
}
```
- literal lookups only for expression strings
- code reduction for setExprFields.
- changed keyword "condition" to "fieldMask" (option -field-mask).
This is a better description of its purpose and avoids possible
naming ambiguities with functionObject triggers (for example)
if we apply similar syntax elsewhere.
BUG: erroneous check in volumeExpr::parseDriver::isResultType()
- not triggered since this method is not used anywhere
(may remove in future version)
