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-   -   Lift magnitude out of range. (https://www.cfd-online.com/Forums/openfoam-post-processing/243634-lift-magnitude-out-range.html)

aeronerd June 28, 2022 18:35

Lift magnitude out of range.
 
Using pimplefoam on a custom fan mesh:

post-processing in paraview
following tutorial process in other posts:
-extract block
-extract surface
-generate surface normals
-calculator w/ (p*normals) **note density not here....would just make lift magnitude even higher.
-integrate

my pressure magnitudes are wildly high (-5.6E6 to 4.9E6)
U velocities are unusually low.....

I feel like I've missed something essential at the solver level. I have seen that for incompressible solutions p=p/rho.... but that small scaling (1.121 kg/m3) won't correct an E6 magnitude error...

The solution is non-physical (nearly stationary fluid, high pressures, and high velocities near the surface) even though the solver worked along for hours in a stable fashion.


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