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Fluent - Aerodynamic coefficients are not smooth!

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Old   August 26, 2019, 18:05
Post Fluent - Aerodynamic coefficients are not smooth!
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Emanuel Camacho
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Good day.

I'm currently studying the flow field around oscillating airfoils. I want to obtain the aerodynamic coefficients (drag, lift and moment) of the airfoils but these coefficients come with so much (numerical?) noise (see picture '1.png') and I still didn't find the root cause. The desired results should be something like picture '2.png'.

Notes:
- Data presented in '2.png' was filtered.
- Mesh quality is adequate.
- Y_plus parameter is correctly adjusted.
- Remeshing is activated.
- Time step seems to not have a clear influence.

EDIT 1:
- The root cause seems to be related to parallel computation.
Attached Images
File Type: png 1.png (88.5 KB, 9 views)
File Type: png 2.png (44.8 KB, 8 views)

Last edited by Emanuel Camacho; August 27, 2019 at 17:06.
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coefficients, dynamic mesh, fluent

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