Problem with pressure jump in 3d problem
1 Attachment(s)
I have a divergence problem when i use porous jump condition in a 3d problem. I want to model wind passing over a windbreak.
The windbreak was modeled as a solid with 1 mm thickness and it was inserted in a huge control volume. The meshing has like 3 million elements and it was very difficult to mesh. The control volume is attached Can anybody help me? |
hi paisano,
the porous model with 1mm thickness can be simplified as a surface, and set the surface as porous jump boundary condition. in this way, mesh will be easy. the main issue is that the surface sliced the solid for interior zone. hope this will help. regards Guava |
Thanks for the answer, but the porous jump model can only be applied to interior type zones, not to faces.
I donīt know too much of Fluent, but can I do Surfaces with interior Zones? I think not, but i`m not sure. |
Quote:
|
Quote:
|
When it runs with the porous jump-condition, Fluent Crashes. And when i open the Setup again it appears:
Change zone type [3] (Failed) Change zone type [4] (Failed) Change zone type [5] (Failed). Without the porous jump-condition the software doesn`t crash (with Interfaces and interface interior zone created). I'm looking for the solution.. |
A porous jump is applied to 2D faces and appears under the Boundary Conditions tab
Here you only need to input 3 variables, inertial resistance coeff (pressure jump coeff C2), viscous resistance coeff (Face permeability) and medium thickness A porous media is applied to a cellzone and allows you to input the same coefficients but in all 3 directions. Regards Luke |
Quote:
Regards. |
Problem almost solved! the problem that i had is that I couldn't run the model in parallel cores. When I run the problem with serial core nothing bad happens (but it takes too much!). I noted that, when I opened FLUENT and i had the following message:
Warning: Partition method "Metis" is not allowed for autopartitioning for cases with nonconformal interfaces before the interfaces are defined and intersected, use "Principal Axes" instead. You may use the "Metis" partition method after the case is read in and the interfaces are intersected., When i change the partition method (Principal Axes), FLUENT crashes... Anybody know how to solve this? |
Porous jump
Quote:
How does FLUENT treat an inclined surface when specified as a porous jump? I am analyzing heat transfer enhancement with inclined perforated plates? Thanks in advance |
All times are GMT -4. The time now is 16:22. |