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July 7, 2010, 12:49 |
Granular Temperature?
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#1 |
New Member
Join Date: Jul 2010
Posts: 2
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Hi i have a problem with a 3d simulation of an high pressurized bottle (70 bar) discharging a powder into an engine bay (modelled as a big cilynder). The model i use is a Mixture model with Nitrogen Ideal and this powder as 2nd phase (patched at the end of the bottle, near the exit nosel)... the problem is that when i start the simulation i always get high temperatures and the solution diverges immediatly.
I think it is related with the granular temperature of the powder, cause i donīt know what is it and what should be a good value to set... I think that the mesh is good, it is HEXA with determinants all over 0.3 and angles over 27°... Thanks in advance |
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July 8, 2010, 10:24 |
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#2 |
Member
Amol Ramteke
Join Date: May 2009
Location: Kolkata
Posts: 30
Rep Power: 16 |
Granular Temperature is not temperature. It is the kinetic energy posses by the particle before collussion
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July 8, 2010, 10:40 |
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#3 |
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Join Date: Jul 2010
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yes i know, but i donīt know what is a good value for my case... i thought that setting a strange value could screw up my simulation and let fluent going nuts (high temp, high viscosity ratios and so on)..
Default value is 0.0001 but i donīt know if it is good or not for my simulation, do you have any experience with granular flow? My particles are really small, something like 5 micrometers... Thanks |
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