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Pressure curve solid "zero" over all iterations

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Old   March 26, 2021, 10:32
Default Pressure curve solid "zero" over all iterations
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A. H. Shukry
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Hello,
Attempting to simulate flow in a 19-inch Rack, with added fans and heat exchange coils etc. as part of a project to design a self cooled IT Cabinet.
Model built in CAD and imported into Autodesk CFD 2106-SP2.
The pressure curve (in the convergence plot) is solidly "zero" throughout all
the iterations.



Double checked everything, tried advection 1 and 5, etc. and pressure would not budge! even though we have decent velocities at the fans.


Anyone faced this before ? Any help would be appreciated.

Pressure :

https://drive.google.com/file/d/1e_8...ew?usp=sharing
Other curves :
https://drive.google.com/file/d/1ZSd...ew?usp=sharing
Velocity (red is approx. 1200 ft/min.) :
https://drive.google.com/file/d/1QeV...ew?usp=sharing
Model overview ( 80x120x220 cm wxdxh ) :
https://drive.google.com/file/d/11BJ...ew?usp=sharing
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Old   April 13, 2021, 11:40
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A. H. Shukry
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Hello,


This is me replying to myself.
Thought it may be of use for someone who faces the same problem.


Solution was actually a 'trick' or work-around due to some limitation :


create a thin ring of air around the fan connecting the two air mediums.


That's it.
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