Number of particle in DPM simulation is too high

Anshs · February 21, 2021, 13:15

dpm conc.JPG

number tracked = 152387, escaped = 85, aborted = 0, trapped = 0, evaporated = 0, incomplete = 0, incomplete_parallel = 0.

I have a simulation where I'm injecting particles at the bottom of a vessel, Why am I getting such a high number of particles in my simulation. I don't want such high numbers due to issues with max particle loading and continuity.

I'm using surface injection with the inlet surface having 41 cell centers.

Setup: Flow rate = 0.0009768 (kg/s) , Velocity = 0.1 m/s

DPM iteration interval = 2, Unsteady tracking at fluid time step

Fluid time step = 0.001 sec , Max iterations = 30.

Thanks for the help.

ahmed banna · March 2, 2021, 05:30

I recommend you refer to documentation published by Ansys Fluent including the theory guide and user guide as they correlate the different models with the recommended operating range.
i have used dpm to simulate dilute flow with air at low ST you can refer to pepar
(An experimental and theoretical study on particles-in-air behavior characterization at different particles loading and turbulence modulation)
DOI ; https://doi.org/10.1016/j.aej.2019.04.002

February 21, 2021, 13:15	Number of particle in DPM simulation is too high	#1
Anshs Member Anshuman Sinha Join Date: Oct 2018 Posts: 70 Rep Power: 8	dpm conc.JPG number tracked = 152387, escaped = 85, aborted = 0, trapped = 0, evaporated = 0, incomplete = 0, incomplete_parallel = 0. I have a simulation where I'm injecting particles at the bottom of a vessel, Why am I getting such a high number of particles in my simulation. I don't want such high numbers due to issues with max particle loading and continuity. I'm using surface injection with the inlet surface having 41 cell centers. Setup: Flow rate = 0.0009768 (kg/s) , Velocity = 0.1 m/s DPM iteration interval = 2, Unsteady tracking at fluid time step Fluid time step = 0.001 sec , Max iterations = 30. Thanks for the help.

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March 2, 2021, 05:30		#2
ahmed banna New Member ahmed elbanna Join Date: Oct 2016 Posts: 7 Rep Power: 10	I recommend you refer to documentation published by Ansys Fluent including the theory guide and user guide as they correlate the different models with the recommended operating range. i have used dpm to simulate dilute flow with air at low ST you can refer to pepar (An experimental and theoretical study on particles-in-air behavior characterization at different particles loading and turbulence modulation) DOI ; https://doi.org/10.1016/j.aej.2019.04.002