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[General] Normal direction subset extraction

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Old   September 15, 2017, 12:44
Default Normal direction subset extraction
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badoumba
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Hello viewers,

I have the slice of a wing profile for which I'd like to save the cvs data for Cp values. In order to make my gnuplot visual clearer, I am looking for a way to split the data according to the normals direction, facing upwards and facing downwards, thus allowing a separation of the extrados and the intrados for some complex wing shape (a split filter doesn't work for some cases).

I tried by adding a GenerateSurfaceNormals on top of my slice, then CellCenters and finally Glyphs, but these are all pointing in the same direction (z in my case).

Is anyone have a tip for separating extrados and intrados, maybe with Calculator...

Many thanks!
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Old   September 27, 2017, 08:56
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Quote:
Originally Posted by badoumba View Post
Hello viewers,

I have the slice of a wing profile for which I'd like to save the cvs data for Cp values. In order to make my gnuplot visual clearer, I am looking for a way to split the data according to the normals direction, facing upwards and facing downwards, thus allowing a separation of the extrados and the intrados for some complex wing shape (a split filter doesn't work for some cases).

I tried by adding a GenerateSurfaceNormals on top of my slice, then CellCenters and finally Glyphs, but these are all pointing in the same direction (z in my case).

Is anyone have a tip for separating extrados and intrados, maybe with Calculator...

Many thanks!
Hi Badoumba,

What you can try is to use two "Threshold" filters on your wing profile slice to separate extrados and intrados with the use of the pressure information.

Cheers
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