Including the particle contact force in a DPM UDF

filippo · January 15, 2020, 07:42

I am trying to write a UDF using DEFINE_DPM_BODY_FORCE to modify the friction force acting on particles in CFD-DEM simulations in Fluent. To do this, I need to include in the UDF the normal contact force acting on the particle. However, I haven't found a way to do this in the guide. Is there a way to include the contact forces acting on a particle in a UDF? Thanks.

wcj1n18 · February 18, 2021, 11:45

Hi, sorry this is a while ago now. Were you ever able to find out how to do this? You're using a DPM, i'm trying to do the same for 6DOF model, but unsure what the correct approach is. Did you have any success?

Cheers

filippo · February 18, 2021, 12:32

Quote:

Originally Posted by wcj1n18

Hi, sorry this is a while ago now. Were you ever able to find out how to do this? You're using a DPM, i'm trying to do the same for 6DOF model, but unsure what the correct approach is. Did you have any success?

Cheers

Hi, no worries! I will have to disappoint you, I did not find a way to do this and in the end decided it was easier for me to try another program (MFIX). But I remember searching through a lot of different resources back then and consistently not finding anything, so perhaps it's just not possible. Good luck with your model!

wcj1n18 · February 18, 2021, 13:01

OK, thanks anyway. I will look around and think for a while longer before probably giving up and trying a different software!

January 15, 2020, 07:42	Including the particle contact force in a DPM UDF	#1
filippo New Member Filippo Marchelli Join Date: Feb 2019 Posts: 5 Rep Power: 7	I am trying to write a UDF using DEFINE_DPM_BODY_FORCE to modify the friction force acting on particles in CFD-DEM simulations in Fluent. To do this, I need to include in the UDF the normal contact force acting on the particle. However, I haven't found a way to do this in the guide. Is there a way to include the contact forces acting on a particle in a UDF? Thanks.

February 18, 2021, 11:45	Including the particle contact force in a DPM UDF	#2
wcj1n18 Member Will Crawford-Jones Join Date: Jan 2021 Posts: 43 Rep Power: 5	Hi, sorry this is a while ago now. Were you ever able to find out how to do this? You're using a DPM, i'm trying to do the same for 6DOF model, but unsure what the correct approach is. Did you have any success? Cheers

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February 18, 2021, 13:01		#4
wcj1n18 Member Will Crawford-Jones Join Date: Jan 2021 Posts: 43 Rep Power: 5	OK, thanks anyway. I will look around and think for a while longer before probably giving up and trying a different software!