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Visualization of difference of velocity fields from different regions

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Old   January 10, 2025, 06:11
Question Visualization of difference of velocity fields from different regions
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Fritz
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Dear all,

I am currently on my Bachelor’s thesis and I try to visualize the delta of two velocity fields A and B from two different regions A and B that are geometrically exactly the same. Region A and B originate from two different .sim-files (let’s say also A and B).

Therefore I exported region A and field function Velocity A from .sim-file A via file -> export and selected Region A and field function Velocity A as „export data“ and specified „mesh and solution data“ as .ccm.
We import the file to .sim-file B and next to Region B Region A is created from the import, as well as a field function „Imported Velocity“ (=Velocity A).
Now I created a field function that subtracts velocity A from velocity B (I tried both vectorial and scalar definitions), called „Vel-Diff“.
Then a derived part has to be created: a section plane on which „Vel-Diff“ shall be displayed. In its properties we can specify Region A and B as input parts.
But now the problem is that no matter if I specify both regions or only one region in the derived part, the scene shows „0“ everywhere on the part for „Vel-Diff“, whereas the difference of velocity A and B surely is not 0.

Does anyone know if it is even possible to visualize the delta velocity of two fields from equivalent regions from different sim files?
I apologize for the long post but I tried to be as detailed as possible.

Thank you in advance!
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Old   January 14, 2025, 03:48
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I've never tried it, but according to the help file, you should be able to accomplish what you're trying to do by mapping fields using the data mapper. See the following help file:

Interacting with CAE Software > Data Mappers > Mapping Fields Using Data Mappers
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Old   January 20, 2025, 13:01
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Thank your reply, f-w!
Yes, the Data Mapper is the fitting tool.
The imported Region has to be mapped onto the existing one.
Then, further operations of Post-Processing can be carried out.
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