Comparing Two Flow Results — Lesson 3
How do you compare two flow results in Fluent software?
Dedicated post-processing applications like the Ansys CFD-Post capability or Ansys EnSight™ software have the capability to compare multiple cases. This can also be done in Fluent software directly, but it involves some additional effort, additional files, and potentially a lot of additional memory.
- Run the first calculation and save the results as interpolation file.
2. Run the second calculation.
3. Define Custom Field Functions (CFFs) for the variables you want to compare.
4. Define as many User-Defined Memory (UDM) locations as you have variables to compare.
5. Patch the results into the UDMs with the help of CFFs.
6. Read the interpolation file of the first case, which overwrites all results except the new UDMs.
7. Define new CFFs to calculate the difference between the two results.
The attached document explains this process with a simple example. The example models are also available for download.
Access the relevant files by clicking on this link: Download Files
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