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<font color="black" face="Helvetica" size="2"><span style="font-size:10pt;" dir="ltr">Dear Madam/Sir,<br>
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I am a student at Graz University of Technology starting with Paraview 3.10.1 <font size="2">
and came up w<font size="2">ith a <font size="2">que<font size="2">stion<font size="2">
</font>I can not answer my<font size="2">self.</font> </font></font></font></font>I am using the Filter called 'Mesh Quality' with the 'Scaled Jacobian' option for hexahedral elements. I have some elements which have only six different vertices (instead of
eight, which leads to a wedge) and the result is a value like 1e+30. I want to analyze this result, because in general the range for a 'Scaled Jacobian' is between -1 and +1. Can you provide me with the equation how this 'Scaled Jacobian' is evaluated in Paraview?
<br>
If <font size="2">the 'Scaled Jacobian<font size="2">' is </font></font>evaluated
<font size="2">with min(Jk/(norm(e1k)*norm(e2k)*norm(e<font size="2">3</font>k))), w<font size="2">here e<font size="2">ik
<font size="2">are t<font size="2">he three ed<font size="2">ge</font> vectors <font size="2">
of <font size="2"><font size="2"><font size="2"></font>vertex k </font><font size="2"><font size="2">and Jk is the
<font size="2">Jacobian <font size="2">at <font size="2">vertex k of a hexahedron<font size="2"> (<font size="2">this is evaluated
<font size="2">for</font> <font size="2">all 8 vertices and t<font size="2">hen the minimum is takes</font></font></font>),<font size="2"><font size="2"> we would get a
<font size="2"><font size="2">'0/0' <font size="2">at one vertex of a degenerated hexahedron</font>.<font size="2"> I would expect<font size="2"> to get an error, but instead I
<font size="2">think <font size="2">I get extremely hi<font size="2">gh values. But since the</font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></span></font><font color="black" face="Helvetica" size="2"><span style="font-size:10pt;" dir="ltr"><font size="2"><font size="2"><font size="2"><font size="2"><font size="2"><font size="2"><font size="2"><font size="2"><font size="2"><font size="2"><font size="2"><font size="2"><font size="2"><font size="2"><font size="2"><font size="2"><font size="2"><font size="2"><font size="2"><font size="2"><font size="2"><font size="2"><font color="black" face="Helvetica" size="2"><span style="font-size:10pt;" dir="ltr"><font size="2">
'Scaled Jacobian<font size="2">' s<font size="2">hould </font>take the <font size="2">
minimum of all values in a hexa<font size="2">hedron, I<font size="2"> am not sure what is goin<font size="2">g on there.</font></font></font></font></font></font></span></font></font></font></font></font></font></font>
</font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font><br>
<br>
I have to thank you a thousand times and hope that <font size="2">anyone</font> can help me with my question!</span></font>
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<div style="font-family:Tahoma"><font face="Helvetica" size="2">Best wishes,<br>
</font><font face="Helvetica" size="2">Fastl Thomas, BSc</font><br>
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