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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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      <p><img src="cid:part1.AAFA1EB3.C1F7AC72@onera.fr" name="Image1"
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            color="#0668b3"><font face="Arial, Helvetica, sans-serif"><font
                style="font-size: 9pt" size="2">Arnold
                Wakim</font></font></font></strong><font color="#0668b3"><font
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              Doctorant,<br>
              Département
              d´</font></font></font><font color="#0668b3"><font
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            face="Arial, Helvetica, sans-serif"><font style="font-size:
              9pt" size="2">érodynamique
            </font></font></font><font color="#0668b3"><font
            face="Arial, Helvetica, sans-serif"><font style="font-size:
              9pt" size="2">F</font></font></font><font color="#0668b3"><font
            face="Arial, Helvetica, sans-serif"><font style="font-size:
              9pt" size="2">ondamentale
              et </font></font></font><font color="#0668b3"><font
            face="Arial, Helvetica, sans-serif"><font style="font-size:
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            face="Arial, Helvetica, sans-serif"><font style="font-size:
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              Tél:
              +33 1 46 23 51 83</font></font></font></p>
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