[syntex]

Hello,


for my simulation I need to add torque and thrust to certain cells.
I set my mesh up, so I got those cells and need to add these volumeForces there and I don't have any idea, can anyone help me?

[LuckyTran]

So you have the cells already defined as cellSets?


fvOptions is your friend.

[syntex]

I have the cells as cellZone.

Is there any tutorial on how to do it like syntax etc?

[LuckyTran]

There is a bad example in:

Coded Source

You need to change selectionMode from all to cellSet and add another line to give the label to the cellSet:

type            coded;
selectionMode   all;
fields          (h);
name            sourceTime;

Change this to

type            coded;
selectionMode   cellSet;
cellSet         bananaSet;
fields          (U); // possibly others
name            sourceTime;

And then you need to modify the actual body for your particular source. I.e. change heSource for your source

       heSource[i] += 1e5*sin(200*cellx[i])*V[i];

The reason it's a bad example is that the energy equation is a scalar equation. You need a vector source, not a scalar source.