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#1 |
New Member
Join Date: May 2018
Posts: 1
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I have a problem here, i try to simulate flow pneumatic grain conveyor/pneumatic transport.. on the vertical pipe 3D. I use fluent software, this are some parameters that I use :
1. the steady condition 2. gravity enabled 3. multiphase eulerian Dense DPM (phase 1=air and phase 2=wheat 2mm) 4. viscous k-epsilon (i dunno what i must use standard/RNG/reliazible) 5. drag law on the discrete phase is gas-solid (wen yu/gidaspow/syamlal o brien) 6. Diameter of the pipe is 10 inch 7. total flowrate discrete phase is 37.8 kg/s (wheat density is 900 m3/kg) 8. phase 2 is set as granule (cmiiw because the diameter of the wheat is 3mm, and its length is 5mm, is it still granule?) 9. velocity inlet for the air is 32 m/s 10. pressure outlet is -25000 Pa 11. the length of the vertical pipe is about 20 m When I set all the parameters and i try to calculate.. On the iteration 15 to 20 always report as divergence, and its report "increase relaxation sweep" and "decrease coarsening group"... what it means? what should i do? is that my parameter correct to do this simulation (pneumatic transport)? Thank you for your patience brother ![]() ![]() |
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Tags |
cfd 2017 error, multiphase flow, transport model |
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