data files not being written during parallel run

[gargtarang]

Hi, I am running my case in parallel. My domain remains empty at initial startup t=0. As I run the case in parallel from startup, the program hangs during data writing. But, if I run the case serially for 1st writeInterval and then decompose (using weightField dsmcNMean_Yb) to run parallely, it runs and write the data as well. The program runs fine in serial case. I have attached the case file linearSource.zip

[ccpalaci]

I have also faced this issue when species transport is enabled. Is there any update or suggestion?

[vincentcasseau]

What do you mean by "species transport is enabled" in the context of a DSMC simulation?

[ccpalaci]

I mean CFD simulation (hy2Foam), by modifying the' multiSpeciesTransport' entry from noSpeciesDiffusion to LewisNumber.

Edit: species residuals seems to 'nan' and solver crashes.

[vincentcasseau]

The two crashes can't be related. This issue is about an edge case of the DSMC solver involving the size of an IDLList when the following conditions are met:

• parallel run
• load balancing is enabled
• zero particle in the domain at t=0

Please open a new issue and describe your set-up. Did you stage your simulation as advised: https://hystrath.github.io/tutos-hy2foam/#5-running-your-own-case

[ccpalaci]

Sorry for the mistake, thanks for the explanation.

[gargtarang]

I want to add in this.. The problem of parallel data writing in first time step is not faced while running dsmcFoamPlus from MNF version.

Thanks