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Old   September 5, 2013, 22:35
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Shashwat
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Dear all,

I have a doubt in the domain interface tab (fluid-porous), I found the following option. interface model>option >pressure change
What is exact meaning of it?
for example, I just put the default value of 70 mmHg.

Can you please explain the theory of it?

I set fluid domain initialization as 89 mm Hg .


is it correct the porous domain pressure is 19 mm Hg? if this is correct , we can put the porous domain pressure initialization as 19 mmHg instead.


Thank you
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Old   September 6, 2013, 10:34
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Bruno
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With the tab 'Addition Interface Models' opened, hit F1 on your keyboard.

Quote:
Pressure Change
Enter a numerical quantity or CEL expression that specifies the pressure change across the interface (from side 1 to side 2). If there is a pressure drop, the specified value should be negative.
This is a pressure jump you specify across the interface. So if side1 has a pressure of 89 mm Hg and the jump is set to 70 mm Hg, side2 should have pressure of 159 mm Hg.

This should be used to model local pressure losses (a screen, for example) or to fix the pressure loss on a periodic translational domain, not to model the pressure loss across a porous domain. For that you should use the porous domain loss model.

Cheers.
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Old   September 7, 2013, 01:35
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Shashwat
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Quote:
Originally Posted by brunoc View Post
With the tab 'Addition Interface Models' opened, hit F1 on your keyboard.



This is a pressure jump you specify across the interface. So if side1 has a pressure of 89 mm Hg and the jump is set to 70 mm Hg, side2 should have pressure of 159 mm Hg.

This should be used to model local pressure losses (a screen, for example) or to fix the pressure loss on a periodic translational domain, not to model the pressure loss across a porous domain. For that you should use the porous domain loss model.

Cheers.
It is very useful information and clear
Thank you so much.
Regards.
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