[PeterShi]

Hello there,

I know setFields can set initial values for the specific regions. However, if I want to set values for specific regions permanently during the simulation, what should I do?

Additionally, could anyone please tell me what does following list mean in setFields? (like what is the meaning of boxToCell?)
boundaryToFace
boxToCell
boxToFace
boxToPoint
cellToCell
cellToFace
cellToPoint
cylinderAnnulusToCell
cylinderToCell
faceToCell
faceToFace
faceToPoint
faceZoneToCell
faceZoneToFaceZone
fieldToCell
labelToCell
labelToFace
labelToPoint
nbrToCell
nearestToCell
nearestToPoint
normalToFace
patchToFace
pointToCell
pointToFace
pointToPoint
regionToCell
rotatedBoxToCell
setToCellZone
setToFaceZone
setToPointZone
setsToFaceZone
shapeToCell
sphereToCell
surfaceToCell
surfaceToPoint
zoneToCell
zoneToFace
zoneToPoint

So many thanks.

Best regards,
Peter

[alexeym]

Hi,

You can use fixedValueConstraint. Example is in header comment of $FOAM_SRC/fvOptions/constraints/fixedValueConstraint/FixedValueConstraint.H

It is a list of available ways to describe area, where setFields will set fields. boxToCell converts box into set of cells, i.e. select all cells with centres inside a box).

[PeterShi]

Originally Posted by alexeym

Hi,

You can use fixedValueConstraint. Example is in header comment of $FOAM_SRC/fvOptions/constraints/fixedValueConstraint/FixedValueConstraint.H

It is a list of available ways to describe area, where setFields will set fields. boxToCell converts box into set of cells, i.e. select all cells with centres inside a box).

Hello Sir,

Thanks for your reply. So two following points of boxTocell define the limits of that box and determine its corresponding place in the space, right?

Then if my region is irregular, i.e. neither can be described by the box nor the cylinder, what should I do?

I will try the suggested FixedValueConstraint first and see how it works.

So many thanks.

Best regards,
Peter

[alexeym]

There is surfaceToCell class, which can use arbitrary surface to select cells. Also "irregular" is rather vague word. Up to certain precision irregular region can be presented as a set of boxes.

[PeterShi]

Originally Posted by alexeym

There is surfaceToCell class, which can use arbitrary surface to select cells. Also "irregular" is rather vague word. Up to certain precision irregular region can be presented as a set of boxes.

Hello Sir,

Thanks for the help, let me have a try.

Have a nice day.

Best regard,
Peter

[PeterShi]

Originally Posted by alexeym

There is surfaceToCell class, which can use arbitrary surface to select cells. Also "irregular" is rather vague word. Up to certain precision irregular region can be presented as a set of boxes.

Hi Sir,

I succeeded with your advice, thank you so much.

Best,
Peter