Air pressure in a vessel
- JB
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18 years 10 months ago #504
by JB
Air pressure in a vessel was created by JB
Hello!
If I want to simulate how a pressure from a fluid (say air) affect steel, how do I construct my DEFI_MATERIAU for air, the AFFE_MATERIAU should be simple just telling which groups of elements contains of which material. How do I construct AFFE_MODELE? I suppose I have to use two AFFE-options but I'm unsure how to construct this.
Also the AFFE_CHAR_MECA I have problems with, how can I build the comm-file telling that I have a pressure on one face of the air and how do I know in which direction this pressure is?
Is thankful for any for any answers
/JB
If I want to simulate how a pressure from a fluid (say air) affect steel, how do I construct my DEFI_MATERIAU for air, the AFFE_MATERIAU should be simple just telling which groups of elements contains of which material. How do I construct AFFE_MODELE? I suppose I have to use two AFFE-options but I'm unsure how to construct this.
Also the AFFE_CHAR_MECA I have problems with, how can I build the comm-file telling that I have a pressure on one face of the air and how do I know in which direction this pressure is?
Is thankful for any for any answers
/JB
- Joël Cugnoni
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18 years 9 months ago #507
by Joël Cugnoni
Joël Cugnoni - a.k.a admin
www.caelinux.com
Replied by Joël Cugnoni on topic Re:Air pressure in a vessel
Hi,
I don't understand why you would like to model air in this case: if you know the internal pressure, you can just apply it on the internal faces of your vessel as a boundary condition.
one simple AFFE_CHAR_MECA->PRES_REP (distributed pressure normal to surface=fluid !!) can do the trick (see Piston tutorial, it is similar).
If you don't know the pressure then it is another problem (coupling of an hydrostatic fluid with elastic solid)...
I don't understand why you would like to model air in this case: if you know the internal pressure, you can just apply it on the internal faces of your vessel as a boundary condition.
one simple AFFE_CHAR_MECA->PRES_REP (distributed pressure normal to surface=fluid !!) can do the trick (see Piston tutorial, it is similar).
If you don't know the pressure then it is another problem (coupling of an hydrostatic fluid with elastic solid)...
Joël Cugnoni - a.k.a admin
www.caelinux.com
- JB
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18 years 9 months ago #511
by JB
Replied by JB on topic Re:Air pressure in a vessel
Hi.
My problem is more complex than that, I wasn't clear enough. We can say I have valve instead with an input hole where i put my pressure. Because of the complex shape of the valve I can't say what pressure each face will be affected of.
And my question is how I can simulate the behaviour of the air and how the steel is affected by the pressure from the air.
Thanks
JB
My problem is more complex than that, I wasn't clear enough. We can say I have valve instead with an input hole where i put my pressure. Because of the complex shape of the valve I can't say what pressure each face will be affected of.
And my question is how I can simulate the behaviour of the air and how the steel is affected by the pressure from the air.
Thanks
JB
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