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<p>Hi Neks,</p>
<p>I'm having some problems with computing the gradients of
vorticity. <br>
</p>
<p>So what I do in the usercheck is something like : <br>
</p>
<p><br>
</p>
<p><br>
</p>
<p>call call comp_vort3(vort,work1,work2,vxp,vyp,vzp) ! Computing
vorticity of perturbations <br>
</p>
<p>call gradm1(derivvortx,derivvorty,derivvortz,vort(1,1)) <br>
</p>
<p><br>
</p>
<p><br>
</p>
<p>However, by doing this I do observe some abnormal results when I
plot the fields : derivvortx, derivvorty, derivvortz.</p>
<p>Attached you will find a snapshot of the magnitude of derivvortx
and derivvorty (obtained using paraview)</p>
<p>I am wondering why I am having extremely high values a the
boudary of the elements. Has anyone noticed or faced such a
problem? <br>
</p>
<p><br>
</p>
<p>Even when I increase lx1, reduce dt and reduce the mesh size, the
problem remains..</p>
<p><br>
</p>
<p>Thank you for your time,</p>
<p>Best wishes,</p>
<p><br>
</p>
<p>Arnold<br>
</p>
<p><br>
</p>
<p><br>
</p>
<p><br>
</p>
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