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Results from a software for CFD that uses FEM

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Old   January 19, 2011, 11:30
Default Results from a software for CFD that uses FEM
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Hector Redal
Join Date: Aug 2010
Location: Madrid, Spain
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Hello,

I have developed a software using FEM (finite element method) for solving flows for incompressible fluids.
For validating the software I am trying to compare the results that I obtain with this software (for a lid driven cavity flow), with the reference (Ghia), that is the reference in this kind of domain (lid driven cavity).

I am enclosing the comparison for different reynolds numbers.

The meaning of the pictures is the following:
- vel30x30Re400.JPG. Simulation for a 30 x 30 grid and 400 as reynolds number (Horizontal velocity component in the vertical axis of simetry of the cavity).
- vel30x30uRe1000.jpg. Simulation for a 30 x 30 grid and 1000 as reynolds number (Horizontal velocity component in the vertical axis of simetry of the cavity).
- vel30x30vRe1000.jpg. Simulation for a 30 x 30 grid and 1000 as reynolds number (Vertical velocity component in the horizontal axis of simetry of the cavity).
- vel30x30uRe2500.jpg. Simulation for a 30 x 30 grid and 2500 as reynolds number (Horizontal velocity component in the vertical axis of simetry of the cavity).
- vel30x30vRe2500.jpg. Simulation for a 30 x 30 grid and 2500 as reynolds number (Vertical velocity component in the horizontal axis of simetry of the cavity).

I would like to know if the results I am enclosing could be regarded as valid.
I don't have analysed the impact of mesh size in the results. Maybe for more accuracy I should use a finer grid. I am thinking of using a 50x50 grid instead of a 30x30 grid.

Has anyone simulate this kind of domain with a such finner grid?

Thanks in advance for any value information / feedback you can give me.

Best regards,
Hector.
Attached Images
File Type: jpg vel30x30Re400.JPG (22.2 KB, 11 views)
File Type: jpg vel30x30uRe1000.JPG (42.3 KB, 10 views)
File Type: jpg vel30x30vRe1000.JPG (33.8 KB, 9 views)
File Type: jpg vel30x30uRe2500.JPG (21.3 KB, 8 views)
File Type: jpg vel30x30vRe2500.JPG (22.0 KB, 7 views)
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