numerical schlieren
 

My understanding is that to generate schlieren and shadowgraph images numerically you calculate take the grad and laplacian operator of density. How can I get better contrast of the shock?

cheers, SHuo

do a log scale of the schlieren

hi
i have recently got my schlieren type image using tecplot but my problem is here that the resolution of the created image is so low. in order to be sure that the procedure i've done to create my schlieren type image is correct, i wanted to know what kinds of variables should we use to plot a schlieren type image? and whether it should be as a contour or a shadowgraph?

thank you very much