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Old   May 18, 2009, 07:47
Default Shock Wave
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Hello Everybody,

I am interested in simulating and visualizing the shock waves in the air with propagating spray.
Could anyone simulate and visualize a shock wave with Star-CD?

Thanks
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Old   May 20, 2009, 03:51
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Anton Lyaskin
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Sure you can simulate a shock wave - Star-CD Validation Test Cases pack has an example of shock tube simulation.

For visualization I can recommend plotting magnitude of density gradient (or density gradient squared - you can try what looks best). When plotted in grayscale it can give you nice Schliren-like pictures. Or you can plot an isosurface in 3D.
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Old   May 20, 2009, 04:38
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Thank you very much Anton,

That's exactly what I was looking for.

And please advise, where can I get Star-CD Validation Test Cases pack?
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Old   May 20, 2009, 07:42
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I've got it from my Star-CD vendor, it occupies 1 CD. I don't have it at hand right now to tell you the size of the shock tube case - may be I'll be able to send it to you via e-mail.
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Old   May 25, 2009, 08:05
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Quote:
Originally Posted by A_Lyaskin View Post
Sure you can simulate a shock wave - Star-CD Validation Test Cases pack has an example of shock tube simulation.

For visualization I can recommend plotting magnitude of density gradient (or density gradient squared - you can try what looks best). When plotted in grayscale it can give you nice Schliren-like pictures. Or you can plot an isosurface in 3D.
Anton,
When you say i need to plot the magnitude of density gradient (or density gradient squared), it means that I first calculate the density, as one of my scalars, and then in post processing I calculate density gradient (or density gradient squared) and plot it in Registar 4, then I plot it in grayscale and get Schlieren like images. Is it correct?

Thank you so much
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Old   May 25, 2009, 15:13
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Anton Lyaskin
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Yes, you're right. BTW, I've found my Validation Test Cases CD. The shock tube example takes only 150 Kb when compressed
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Old   May 25, 2009, 20:43
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Quote:
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Yes, you're right. BTW, I've found my Validation Test Cases CD. The shock tube example takes only 150 Kb when compressed
Dear Anton,
I would really appreciate if you send me the shock tube example file to this e-mail: cadcamclass@gmail.com

Thanks a lot
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Old   May 26, 2009, 12:35
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Ok, I've sent it. It's a simple 1D case, so don't expect much from visualization point of view, it's just to demonstrate simulation procedure.
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Old   July 8, 2009, 14:22
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Can you please forward me the codes at babuu.nishu@gmail.com
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