How do you set up a porous region
Hi,
Im a little confused on how to correctly set up a porous region. I know how to create a porous region. But im confused on what interface i should use (porous baffle?), Also how do you calibrate the settings - i.e. to have a 50/50 and 70/30 porous region? Any advice would be appreciated. regards James |
Read the manual.
It's very simple! Maybe you have to read the expression more than one time but with a little excel sheet you can set the pressure drop you need. |
Thanks Maddin, but by the manual, do you mean the help files?
I've looked there and no luck. Any chance you could expand you answer |
No the help files are only a "little" manual.
You should have some pdf-files in your ccm directory. 2000 pages strong... there you find all you need! |
ah...... i didnt know this existed. Thanks maddin.... this could answer several of my questions!!! (i hope)
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Re:Porous
There is a tutorial called Porous Flow. Go to Help>Training Guide. You may use an In-Place interface too.
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Thanks Niazaliahmed - I am using In-place interfaces now. I have a volume mesh and porous region. I just dont know what to do then - i.e. in the physics values in the porous region. I see there is a porosity setting (constant) which as default is set at one. I've tried changing this value to numerous values between 0 - 1.0 but nothing seems to work.
- I have tried the tutorial If i apply the same process - i.e. Axisymetric Tensor; and random Pi and Pv values i do get a result. But i cannot validate this process or values or the accuracy of the given results. Any further suggestions would be gratefully appreciated. |
The value of porosity just have effect when you are running unsteady simulations, if you are running steady, just set the Porous Inertial Resistance and Viscous Resistance.
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@Vinicius - Thank you. Thats fine. So i guess the next question is which Tensor you use? Following this i need to establish accepted values for initial and viscous resistance for trees.
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Hey James,
Given a geometry, how to create a porous region from it? Thank. |
Sorry, i dont understand you question.
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You've to choose the tensor according the flow direction in the porous region and its geometric characteristic. you have to know if the porous region is isotropic un-isotropic, axial-symmetric etc. For Inertial and Viscous resistance values you must have a characteristic curve (velocity/DP or similar) of the considered material. If you need further help please describe your problem in detailed way by |
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I just have no idea how to set B as a porous region and what parameters I need although I've read through that porous region tutorial... Any help would be appreciated. |
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