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How to initialize computational full of discrete particles to DPM or DDPM simulations |
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August 12, 2015, 04:51 |
How to initialize computational full of discrete particles to DPM or DDPM simulations
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#1 |
New Member
Daniel José de Oliveira Ferreira
Join Date: Aug 2015
Posts: 4
Rep Power: 11 |
Hi friends
How to initialize the case with a certain region filled with particles for DPM or DDPM simulation? I need to set up a initial patch for a determinate amount of particles in the computational domain before run the simulation. Is there something like it is done for Euler-Euler simulations? (where you can make initialize - patch - phase2 - volume fraction in a specif region) thanks in advance Daniel José |
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August 15, 2015, 07:31 |
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#2 |
Member
Jim
Join Date: May 2015
Posts: 47
Rep Power: 11 |
Hi Daniel,
I have a problem that is quite similar to yours in my own simulations. you need to have an injection (or injections) in order for DPM to be present in the model. I believe DDPM also need to have an injection. if you want to create an injection in every cell, I have found this is possible but not straight forward. the way I'm doing it currently is using a UDF to write an injection file. If you're in 2D i think you can also do a surface injection, and activate an tickbox that will weight every injection according to the area of the cell face. I think Fluent has a beta function called "volume injection" in recent releases (v15/16) but I haven't explored this myself. n.b. I don't have a lot of experience with DDPM. |
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August 17, 2015, 08:52 |
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#3 | |
New Member
Daniel José de Oliveira Ferreira
Join Date: Aug 2015
Posts: 4
Rep Power: 11 |
Quote:
Thank you so much CFDYourself It worked for me in a initial test. I had some problems with divergence at the beginning but I could make a simple test with a small number of particles. There is a pdf material with a lot of beta functions not only for disperse phase modeling, but for almost all modeling tools available in Fluent. Just search in google "Fluent 15.0 beta functions manual". Thanks Again. |
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Tags |
ddpm, euler-lagrange, initialize particles |
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