about pressure far field

June 18, 2002, 03:58

Hi, everyone. I'm setting a "prsssure far field" boundary condition. But, when I start to initialize it, the Flunent main window always inform me: Error: divergence detected in AMG solver: pressure correction Error Object: () absolute pressure limited to 0.000000e+00 in 1241 cells on zone 1 I don't know what had happened. Who can give me a hand? Thanks a lot!

June 18, 2002, 19:38

You have to change the pressure limits..Increase It higher than the far field pressure..Good Luck

June 18, 2002, 19:59

Yes, I've tried it. But it is the same result,if only I use ideal gas. Well, if I use another fluid, everything will be ok. I have to use ideal gas, however, so I can employ "pressure far field". Really, it's still not clear for me. Thanks a lot!

June 18, 2002, 22:16

Pressure far field is always used with compressible flow where you must consider the flow as ideal..I may be able to help if you can describe the problem you are intending to solve..GOOD LUCK...

June 18, 2002, 23:24

Ok, I'm going to send an email to you. Ok? thanks a lot!

June 18, 2002, 03:58	about pressure far field	#1
fan Qunbo Guest Posts: n/a	Hi, everyone. I'm setting a "prsssure far field" boundary condition. But, when I start to initialize it, the Flunent main window always inform me: Error: divergence detected in AMG solver: pressure correction Error Object: () absolute pressure limited to 0.000000e+00 in 1241 cells on zone 1 I don't know what had happened. Who can give me a hand? Thanks a lot!

June 18, 2002, 19:38	Re: about pressure far field	#2
Jim Clancy Guest Posts: n/a	You have to change the pressure limits..Increase It higher than the far field pressure..Good Luck

June 18, 2002, 19:59	Re: about pressure far field	#3
fanadam Guest Posts: n/a	Yes, I've tried it. But it is the same result,if only I use ideal gas. Well, if I use another fluid, everything will be ok. I have to use ideal gas, however, so I can employ "pressure far field". Really, it's still not clear for me. Thanks a lot!

June 18, 2002, 22:16	Re: about pressure far field	#4
Jim Clancy Guest Posts: n/a	Pressure far field is always used with compressible flow where you must consider the flow as ideal..I may be able to help if you can describe the problem you are intending to solve..GOOD LUCK...

June 18, 2002, 23:24	Re: about pressure far field	#5
fanadam Guest Posts: n/a	Ok, I'm going to send an email to you. Ok? thanks a lot!

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