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UDF measuring transient DPM concertation when airflow is steady.

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Old   November 29, 2021, 15:37
Question UDF measuring transient DPM concertation when airflow is steady.
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Jake C
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I am running a one-way coupled DPM simulation with a very large number of massless particles from an instantaneous release in the context of indoor air quality.

I would like to use a steady-state airflow field, but would like to get the transient particle concentrations in each cell at a time-step that is much larger than the individual particle time-steps. The only way i found for exporting particle data when using steady-state airflow was by using:

Results>Graphics> Particle Tracks > and selecting "step by step" >report to file

This results in an extremely large .dpmrpt file with the trajectory of each particle at every particle time step.

I don't have much experience with UDFs, but all the discussions I have seen using UDFs to get the transient particle concentrations appear to use unsteady-particle-tracking and are then called at each flow time step.

Is there a way to call a similar function at a specified time increment not related to the particle time steps?
Can anyone give me more advice on post processing one-way coupled steady-airflow simulations with transient particle releases?
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