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how to improve convergence for fine mesh E-E model for fluidized bed? |
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#1 |
New Member
cfd
Join Date: Oct 2011
Posts: 6
Rep Power: 15 ![]() |
the convergence is 1e-8s! and takes ages (literally)
![]() even 1e-7,1e-6s time step would make a huge difference. any tips?? |
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#2 |
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mohammad sadegh
Join Date: Apr 2011
Posts: 5
Rep Power: 16 ![]() |
How many phases are there in your simulation? what is the number of transport equation which should being solved and the degree of coupling? hence, you should enter 1e-3 for absolute criteria of continuity, and enter 1e-5 for time step at first simulation, before this procedure you must simplify your problem.
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#3 | |
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Maryam
Join Date: Sep 2012
Posts: 11
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Quote:
hi i am simulating a fluidized bed. i have a problem. there is reversed flow at outlet boundary and the solution does not converge. how can i solve this problem. Thank you in advance |
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#4 |
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mohammad sadegh
Join Date: Apr 2011
Posts: 5
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be sure the gravity is activated
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#5 |
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Maryam
Join Date: Sep 2012
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#6 |
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Maryam
Join Date: Sep 2012
Posts: 11
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#7 |
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mohammad sadegh
Join Date: Apr 2011
Posts: 5
Rep Power: 16 ![]() |
yes it must be activated in operating condition panel
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#8 |
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Tamil Nadu
Join Date: Oct 2012
Posts: 44
Rep Power: 14 ![]() |
Hello All,
I want to do analysis of heat transfer from water flowing through pipes submerged inside concrete. I am modelling in GAMBIT and wish to analyse it on Ansys FLUENT. Can anybody help me out, how to model and simulate? Does any tutorials exist? |
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Tags |
eularian-eularian model, fluidized bed, very slow convergence |
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