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fireFoam/reactingFoam with ISAT results in processor heat up

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Old   February 1, 2022, 12:48
Default fireFoam/reactingFoam with ISAT results in processor heat up
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Jeff
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I have been testing fireFoam & reactingFoam for use with ISAT (TDAC with no reduction) on a uniformly resolved, static mesh based on the smallPoolFire2D tutorial and noticed that the data on one processor heats up differently than all the others. I have also tried performing these runs in serial, where the entire domain heats up accordingly (unphysical for the entire domain to instantly heat up). I have included a screenshot of what this looks like. The following details are the differences from the tutorial:
- 2mm resolution
- laminar combustion and turbulence model
- GRI mech 3.0 + TDAC (only tabulated chemistry - ISAT)

I have ran this in OF7, OF9, OFdev and v2012, with fireFoam (buoyantReactingFoam) and reactingFoam - both show the same result. However, when I turn TDAC off, all 4 trials work fine. I have attached my chemistryProperties file from an OF7 run.

More than happy to also upload the full case for anyone willing to take a gander.
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File Type: jpg image (1).jpg (107.3 KB, 10 views)
Attached Files
File Type: txt chemistryProperties.txt (1.2 KB, 4 views)

Last edited by jfg5067; February 1, 2022 at 18:12.
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Old   February 2, 2022, 09:51
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issue ended up being ISAT tolerance too low (3e-3 moved to 3e-6), although I am still at a bit of a loss why the lower tolerance on the tabulation accuracy led to one processor deviating in solution from the others so significantly
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chemistry, firefoam, isat, reactingfoam, tdac

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