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<div><font size="2">When I set up my velocity vector with a calculator, I use <font face="Times New Roman, serif" size="3">iHat*U+jHat*V+kHat*W. Then, after selecting streamtracers, I automatically get several new plotting parameters, including "vorticity".
Normally, vorticity is defined as Del cross Velocity_vector. Is that what Paraview does behind the scenes? Is this written somewhere, so I can take a look?</font></font></div>
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<div><font face="Times New Roman, serif">Thanks!</font></div>
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<div><font size="2" color="#0000FF">Alan</font></div>
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