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December 17, 2009, 12:01 |
Boundary conditions
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#1 |
New Member
Join Date: Nov 2009
Posts: 8
Rep Power: 16 |
Hi to all....i have a problem!! I have water flowing in a pipe with several changes of section. The water has a pressure of 10 bar and a flow rate of 2kg/s in the input section. I do not understand how to set both of these data in the boundary conditions. Can you help me?
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December 18, 2009, 07:54 |
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#2 |
New Member
Peter Watson
Join Date: Dec 2009
Posts: 1
Rep Power: 0 |
Questions this fundamental on the use of any CFD code are best resolved by taking the appropriate training course.
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December 19, 2009, 11:44 |
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#3 |
New Member
Irshad
Join Date: Dec 2009
Location: Bangalore
Posts: 19
Rep Power: 16 |
Hello,
go to the zones i.e. third option of operation in Gambit. There you can go for assigining of boundary types not the values. Values will be given in Fluent. For reference Go through the tutorials provided by fluent. |
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December 20, 2009, 09:30 |
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#4 |
Member
Join Date: Oct 2009
Location: Italy
Posts: 88
Rep Power: 16 |
ciao simone
per le condizioni al contorno le devi specificare in Gambit o il software per la mesh. Poi in Fluent puoi modificare sia la condizione al contorno che impostare i valori specifici per la soluzione del problema a secondo del modello. |
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December 22, 2009, 03:34 |
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#5 |
New Member
Join Date: Nov 2009
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Ok .... I'll try to explain better! I have no problems in general in setting the boundary conditions ....I have to calculate the pressure drop in a nozzle. I know the incoming water pressure, its temperature and flow rate. I want to know the speed in output and especially the loss of pressure in the nozzle when the inlet pressure is 10 bar. Now ... I'm confusing between operating conditions and boundary conditions. I do not know the exit pressure .... but I would use "pressure outlet" on the output section because I know that is more accurate ... and what I put as "gauge pressure" in the outlet? I do not know! Input I want to use "mass flow inlet" and here there are no problems. But the pressure of 10 bar where you put it? In operating conditions? HELP
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