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August 26, 2016, 15:20 |
cfx-pre
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#1 |
New Member
Join Date: May 2015
Posts: 11
Rep Power: 10 |
hi everybody
i am working on simulating a solar chimney and i have a problem. for converging first we st boundary condition as follow: inlet: static pressure (1 atm) outlet: mass flow rate (0.05 kg/s) and i set ideal gas for flow. during the solving i monitor the mass flow at inlet but after few seconds it converge to zero where do you think i made a mistake??? thanks |
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August 27, 2016, 07:41 |
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#2 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,665
Rep Power: 143 |
Have a look at your results file in CFD-Post. That should give you some clues about what is wrong.
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August 27, 2016, 12:32 |
result file
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#3 |
New Member
Join Date: May 2015
Posts: 11
Rep Power: 10 |
thanks ghorrocks
i got result and saw that the velocity vectors at inlet are toward outside and because of this problem the mass flow at inlet is zero how can i fix it??? thanks |
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August 28, 2016, 07:30 |
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#4 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,665
Rep Power: 143 |
I have no idea what that image is showing. Please explain what you are doing. Labelling your images would help, also showing what you expect to get and why.
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August 29, 2016, 02:31 |
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#5 |
Senior Member
Jiri
Join Date: Mar 2014
Posts: 209
Rep Power: 13 |
Moreover I would try to set "total pressure" instead of "static pressure" at the inlet. Combination of inlet total pressure + outlet mass flow is more stable than inlet static pressure + outlet mass flow.
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