Surface represented incorrectly for NACA profile -- CFD Online Discussion Forums

April 13, 2021, 04:39

Surface represented incorrectly for NACA profile

Sandland

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Join Date: Mar 2021

Posts: 4

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Hello all

I am simulating flow over several Naca profiles. These have been drawn in Solidworks and saved as STEP files. I have this repeating problem for some of the profiles that looks odd at the leading edge (see figure) while the others don't.
I have imported the step file with the "very fine" option and I have a well-refined mesh.

The fin has the dimensions of:
- Chord length: 27 mm
- Width: 1.3

Mesh settings:
- Prism layer Thickness: 2.0E-4 m
- Prism layer number: 18
- Prism layer Stretching: 1.1
- Surface Curvature: 200
- Surface Growth Rate: 1.1
- Surface Proximity: 2 points in gap
- Template Growth Rate: Very slow

Do you have any suggestions on what I could try to improve the surface representation.

Attached Images

	Naca_Profil_Zoom.jpg (56.7 KB, 13 views)
	Naca_Profil.jpg (77.1 KB, 10 views)

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