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June 3, 2013, 17:11 |
Boundary conditions
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#1 |
New Member
e
Join Date: Jun 2013
Posts: 3
Rep Power: 12 |
Hello everyone! Could anybody help me what should I put on a ballon-car (gondola) as a boundary conditions. I have a active disc area and (this is all in 3d) there should be a propeller, but for fisrt resolution I have to calculate without fan - just an active disc. I've tried to put in Inlet&Outlet velocity, mass flow, pressure - overflow (Error!!) anyway - Mach number->100000... Mesh has a good quality - the problem is in boundary conditions or smth else. Who solves smth like this HELP! SST-model, step is a really small (doesn't help too). Maybe I don't know smth, let me know.[/IMG http://i031.radikal.ru/1306/cf/1e9ee99f25ba.jpg]
Last edited by Brainiak; June 3, 2013 at 17:22. Reason: propeller |
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June 4, 2013, 02:45 |
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#2 |
Senior Member
hamed
Join Date: Apr 2009
Posts: 148
Rep Power: 17 |
I don’t understand your model definition and your approach. (I think nobody knows and that’s why your question is still unanswered !)
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June 4, 2013, 04:54 |
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#3 | |
Senior Member
OJ
Join Date: Apr 2012
Location: United Kindom
Posts: 473
Rep Power: 20 |
Quote:
Jokes aside, like hamed says, more details (explained lucidly) about your BCs and problem definition can help you get more help in the forum OJ |
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June 4, 2013, 13:52 |
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#4 |
New Member
e
Join Date: Jun 2013
Posts: 3
Rep Power: 12 |
It's a gondola in ideal gas, ok? I have pressurein DOMAIN, velocity_x and Temperature in inlet, and difference in pressure in outlet. In inlet_disc I've tried to put velocity as in outlet_disc, but it doesn't work. How to set conditions to solve this? It's clear?
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June 5, 2013, 06:04 |
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#5 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,700
Rep Power: 143 |
Is it clear? - No, not yet. An image would help.
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