Shock Wave
 

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

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.

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?

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.

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

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

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.

Can you please forward me the codes at babuu.nishu@gmail.com