<div dir="auto">If you do not need curved elements set<div dir="auto"><br></div><div dir="auto">Mesh.SecondOrderLinear = 1</div><div dir="auto"><br></div><div dir="auto"><br><br><div data-smartmail="gmail_signature" dir="auto">--<br>jeremy theler<br><a href="http://www.seamplex.com">www.seamplex.com</a></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Sep 4, 2020, 11:22 Stephen Wornom <<a href="mailto:stephen.wornom@inria.fr">stephen.wornom@inria.fr</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Tell the list if it removes the negative values.<br>
Thanks,<br>
Stephen<br>
<br>
----- Original Message -----<br>
> From: "Christophe Geuzaine" <<a href="mailto:cgeuzaine@uliege.be" target="_blank" rel="noreferrer">cgeuzaine@uliege.be</a>><br>
> To: "Nikhil Vaidya" <<a href="mailto:nikhilvaidya91@gmail.com" target="_blank" rel="noreferrer">nikhilvaidya91@gmail.com</a>><br>
> Cc: <a href="mailto:gmsh@onelab.info" target="_blank" rel="noreferrer">gmsh@onelab.info</a><br>
> Sent: Friday, September 4, 2020 2:19:36 PM<br>
> Subject: Re: [Gmsh] Negative Jacobians in 2nd Order Mesh<br>
<br>
>> On 4 Sep 2020, at 13:49, Nikhil Vaidya <<a href="mailto:nikhilvaidya91@gmail.com" target="_blank" rel="noreferrer">nikhilvaidya91@gmail.com</a>> wrote:<br>
>> <br>
>> Hello,<br>
>> <br>
>> I have a geometry for which 1st order tetrahedral meshing works fine (with no<br>
>> negative jacobians). For the 2nd order case, I get a few negative jacobians.<br>
>> This problem does not go away even when I try to regularize the mesh or reduce<br>
>> mesh sizes in certain regions with small geometric features.<br>
>> <br>
>> Does someone have a suggestion?<br>
> <br>
> Try the high-order mesh optimizer: "-optimize_ho" on the command line.<br>
> <br>
> Christophe<br>
> <br>
>> <br>
>> Best regards,<br>
>> Nikhil<br>
>> _______________________________________________<br>
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> <br>
> —<br>
> Prof. Christophe Geuzaine<br>
> University of Liege, Electrical Engineering and Computer Science<br>
> <a href="http://www.montefiore.ulg.ac.be/~geuzaine" rel="noreferrer noreferrer" target="_blank">http://www.montefiore.ulg.ac.be/~geuzaine</a><br>
> <br>
> <br>
> <br>
> <br>
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<br>
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</blockquote></div>