Learning Forum

[weiqi guo]

How to output the velocity, separation position, diameter and separation time of the particles stripped from the Euler wall film？

[Rob]

Check the DPM Summary options and set the film wall surface. You'll need to check if the file contains the creation (flow) time or flight time. 

[weiqi guo]

Thank you very much for your reply. Unfortunately, I can confirm that this method is not correct. This method can only obtain the information of particles absorbed on the wall, not the information of particles stripped from the Euler wall film.

[Rob]

OK, Set the interior (fluid facet zone) instead. The resulting file is all of the DPM interactions with the surface so you'll need to do some data management to find the first time a particle ID is used. 

[weiqi guo]

Thank you very much for your reply. In fact, I have tried this method before, but I found that after removing the duplicate particle ID in the resulting file, the number of particles is not consistent with the number of s stripped from the Euler wall film, and there is always a part of particle id not in the resulting file. I can confirm that this omission is not caused by manipulation of the resulting file.

[Rob]

I'll ask this side. 

[Rob]

And the response is either the interior method or write a UDF to track particles are they're created and write the position to a file. You've found some potential issues with the former, and re the latter, that's about all I can suggest other than read the UDF manual. Enhancement request going in as it's a useful feature.