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[blockMesh] Curved or wavy geometry

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Old   January 2, 2020, 12:38
Default Curved or wavy geometry
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Alex
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Hello everyone,

I need to build a 2d mesh that is basically a vertical rectangle where 3 sides are straight but one (that one on the right) has the shape of a wave (or sine curve).

My idea was to build a lot of blocks with blockmesh, like a puzzle, but I do not know if there is a faster way to generate a sinusoidal shape.

If you have any suggestion or just a comment please help me.

I am quite new in OpenFOAM and I do not know if blockmesh is the right tool for my purpose, in case let me know.
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Old   January 3, 2020, 04:53
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Hi,

When you mean 2D, with blockMesh, remember that you will need to have only 1 element in the 3rd direction....

As for creating sine curve, what you can do is to specify a spline between the two vertices in the edges subsection.

For example, you could have something like this:

Code:
vertices
(
    (0 0 0)
    (1 0 0)
    (1 1 0)
    (0 1 0)
 
    (0 0 1)
    (1 0 1)
    (1 1 1)
    (0 1 1)
);

blocks
(
    hex (0 1 2 3 4 5 6 7) (10 10 1) simpleGrading (1 1 1)
);

edges
(
    spline 2 1 ((0.8 0.75 0) (1 0.5 0) (1.2 0.25 0))
    spline 6 5 ((0.8 0.75 1) (1 0.5 1) (1.2 0.25 1))
);
Hope this helps.

Cheers,
Antimony
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Old   January 6, 2020, 18:43
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Alex
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Using "spline" I very easily managed to make the sine curve I was looking for, thank you so much!
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curve mesh, wavy channel, wavy fins

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