Learning Forum

[majam]

Hello,

I am simulating a mixing tank with 3 moving regions (impeller regions) and one stagnant one (the rest of the tank).

After the flow becomes steady I wish to add a scalar source term in a region inside the tank (the stagnant region) . I want the source term to be in a specific region (for instance a sphere with diameter 0f 1-2 cm near the tank surface).

If I add the source term without identifying a region it will be applied to the whole tank not only a small region.

I was thinking if I define a region inside the tank (using adapt /refine/new region), then use an expression in the source term.

I am not sure though how to define the expression in the source term the way that source term will be generated only at that specific location.

I would appreciate it if anyone can help me?

[Rob]

Not quite (rather, not yet). You need to split the cells zone using the register and then apply the source to the new zone.

[majam]

Thank you for your response.
In this case, is it better to create a separate region when I am developing the Geometry (in design modeler or space claim) or just separating the cell zone in fluent is fine? or either way I am getting the same results?
Thanks

[aitor.amatriain]

You could also include some "if" statements in the definition of the source term so that it vanishes outside the desired zone.

[Rob]

That works too.