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How can I compare two cases in Tecplot?

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Old   June 7, 2017, 22:50
Question How can I compare two cases in Tecplot?
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yehanyu
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Hello everybody,
I have two FLUENT cases and their meshes and boundary conditions are identical. The difference is that the two cases are computed with different solver settings (time step size, spatial discretization scheme, etc.). Now I want to compare these two cases. Does anybody know whether I can subtract these two cases in Tecplot? (for instance, subtract the velocity field of case 2 from that of case 1, then I can examine the difference of velocity field between these two cases)
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Old   June 8, 2017, 20:50
Default Duplicate, Specify equations
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Svetlana Tkachenko
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- Export the data from Fluent to Tecplot.
- Load both data sets into Tecplot.
- Data → Create Zone → Duplicate. Duplicate any zone you like, click OK.
- Data → Alter → Specify equations. Select the third zone. Write {VARNAME}={VARNAME}[2]-{VARNAME}[1], replacing VARNAME with the variable name of interest. Click Compute.
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Old   June 8, 2017, 22:09
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Quote:
Originally Posted by Светлана View Post
- Export the data from Fluent to Tecplot.
- Load both data sets into Tecplot.
- Data → Create Zone → Duplicate. Duplicate any zone you like, click OK.
- Data → Alter → Specify equations. Select the third zone. Write {VARNAME}={VARNAME}[2]-{VARNAME}[1], replacing VARNAME with the variable name of interest. Click Compute.
Thank you very much.
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Old   June 9, 2017, 02:36
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You're welcome.
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Old   February 26, 2019, 13:36
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dan
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In newer versions of Tecplot (360) you dont have to export first. You can just load in a cas/dat file. Then load in another cas/dat pair and click "append data" in the pop up
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Old   February 26, 2019, 13:40
Default Thanks deenriqu
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Thanks deenriqu, you are right and it makes the comparison a lot easier
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