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October 15, 2009, 07:06 |
particle-particle collisions in DPM model
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#1 |
New Member
Payan
Join Date: Oct 2009
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In particle tracking in fluent when we choose type of particle as "massless"(Only availabe in ansys-fluent 12) or "inert",the collisions of particles by themselves is considered by fluent or not?is it possible that we track the particles separately??
Last edited by payam_IUST; October 15, 2009 at 08:40. |
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October 15, 2009, 17:13 |
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#2 |
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You can turn On or turn Off the model for collision. The collision model work only with unsteady particle simulation. You can track particle separately. Did you read the user guild for DPM-Model?
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October 16, 2009, 01:53 |
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#3 |
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Payan
Join Date: Oct 2009
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thank you for your reply,
but I track 2000 particle together and write solution variables of a specific particle in a step by step file,Another time I track that particle lonely and compare two files,they was a little different,Why this problem accur if fluent track particles separately? |
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October 16, 2009, 04:07 |
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#4 |
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Default you have turn on the Discrete_Random_Walk in the Stochastic Tracking. You must turn off this Model in Particle Injection when you need always the same trajectories.
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October 16, 2009, 08:18 |
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#5 | |
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Payan
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Quote:
But in this case the particle type is massless and the solver is "laminar" and tracking is steady and for this reasons turbulent dispersion and Discrete_Random_Walk in the Stochastic Tracking is unavailable |
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October 16, 2009, 09:52 |
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#6 |
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Probably Start Positions are different. When the some and no more fluid iteration was made - I don't know. Numeric? When collision model is turn off, you do not have collision influence.
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