<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=Windows-1252">
<style type="text/css" style="display:none;"> P {margin-top:0;margin-bottom:0;} </style>
</head>
<body dir="ltr">
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span>To Whom It May Concern,<br>
</span>
<div><br>
</div>
<div>I have noticed some errors in the tetrahedral meshes, generated by Gmsh (both v3.0.6 and v4.2.2). Under certain circumstances, e.g. volumes with holes, some tetrahedron elements do not align with adjacent tetrahedrons. An example is attached that demonstrates
this error, including images that show the location of the edges that do not connect.<br>
</div>
<div><br>
</div>
<div>I have tried several geometric examples, including meshing algorithms (surface and volume), but this does not fix the problem. The attached example seems to work when selecting “Mesh.Algorithm = 2;”, but this is not always the case for other geometries.<br>
</div>
<div><br>
</div>
<div>Hopefully, this is just a simple mistake in my geometry file.<br>
</div>
<div><br>
</div>
<div>Best regards,<br>
</div>
<span>Kyle</span><br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div id="signature">
<p style="margin:0cm 0cm 0.0001pt; font-size:12pt; font-family:Calibri,sans-serif; line-height:150%; text-autospace:none">
<b><span style="font-size:9.0pt; font-family:"Verdana",sans-serif; color:#60223B">Kyle<span style=""> Jackman</span></span></b><span style="font-size:9.0pt; font-family:"Verdana",sans-serif; color:#60223B"><span style="">
</span></span><span style="font-size:9.0pt; font-family:"Verdana",sans-serif; color:#60223B">|<span style="">
</span>PhD<br>
</span><span style="font-size:9.0pt; font-family:"Verdana",sans-serif; color:#8C979A">Engineer: Department of Electrical and Electronic Engineering</span><span style="font-size:9.0pt; color:#60223B"></span></p>
<p style="margin:0cm 0cm 0.0001pt; font-size:12pt; font-family:Calibri,sans-serif; line-height:150%; text-autospace:none">
<span style="font-size:9.0pt; font-family:"Verdana",sans-serif; color:#60223B">Faculty of Engineering</span></p>
<p style="margin:0cm 0cm 0.0001pt; font-size:12pt; font-family:Calibri,sans-serif; line-height:150%; text-autospace:none">
<b><span style="font-size:9.0pt; font-family:"Verdana",sans-serif; color:#8C979A">e:
</span></b><span style="font-size:9.0pt; font-family:"Verdana",sans-serif; color:#8C979A">kjackman@sun.ac.za</span><span style="font-size:9.0pt; font-family:"Verdana",sans-serif; color:#8C979A"><span style="">
</span><span style="">| </span><span style=""> </span><b>c:</b> </span><span style="font-size:9.0pt; font-family:"Verdana",sans-serif; color:#8C979A">+27 83 574</span><span style="font-size:9.0pt; font-family:"Verdana",sans-serif; color:#8C979A">
</span><span style="font-size:9.0pt; font-family:"Verdana",sans-serif; color:#8C979A">5705</span><span style="font-size:9.0pt; font-family:"Verdana",sans-serif; color:#8C979A"></span></p>
<p style="margin:0cm 0cm 0.0001pt; font-size:12pt; font-family:Calibri,sans-serif; line-height:150%; text-autospace:none">
<b><span style="font-size:9.0pt; font-family:"Verdana",sans-serif; color:#8C979A">a:</span></b><span style="font-size:9.0pt; font-family:"Verdana",sans-serif; color:#8C979A">
</span><span style="font-size:9.0pt; font-family:"Verdana",sans-serif; color:#8C979A">Department of Electrical and Electronic Engineering | Banghoek Road | Stellenbosch 7600</span></p>
<div style="margin:0px 0cm 0.000133333px; font-size:12pt; font-family:Calibri,sans-serif">
<a href="https://www.facebook.com/stellenboschuniversity" title="https://www.facebook.com/stellenboschuniversity"><img class="EmojiInsert" style="max-width:100%" data-outlook-trace="F:1|T:1" src="cid:c34f7742-5a01-4dc1-a0c3-67be45f14ffe"></a><a href="https://twitter.com/StellenboschUni" title="https://twitter.com/StellenboschUni"><img class="EmojiInsert" style="max-width:100%" data-outlook-trace="F:1|T:1" src="cid:863bc4ce-f724-4c6a-81d4-bd8405f1522f"></a><a href="https://www.instagram.com/stellenboschuni" title="https://www.instagram.com/stellenboschuni"><img class="EmojiInsert" style="max-width:100%" data-outlook-trace="F:1|T:1" src="cid:c993c6e5-23cd-4be6-bdaa-84352df83601"></a><a href="https://www.linkedin.com/edu/school?id=19873&trk=tyah&trkInfo=clickedVertical:school,clickedEntityId:19873,idx:3-1-6,tarId:1478079024397,tas:stellenboschu" title="https://www.linkedin.com/edu/school?id=19873&trk=tyah&trkInfo=clickedVertical:school,clickedEntityId:19873,idx:3-1-6,tarId:1478079024397,tas:stellenboschu"><img class="EmojiInsert" style="max-width:100%" data-outlook-trace="F:1|T:1" src="cid:feca9445-3083-4a71-a43f-08a5fe21d5e3"></a><a href="https://www.youtube.com/user/StellenboschUni" title="https://www.youtube.com/user/StellenboschUni"><img class="EmojiInsert" style="max-width:100%" data-outlook-trace="F:1|T:1" src="cid:5d5631a8-f834-4f96-be4c-7f1e216c30b9"></a><br>
</div>
<div style="margin:0px 0cm 0.000133333px; font-size:12pt; font-family:Calibri,sans-serif">
<img class="EmojiInsert" style="max-width:100%" data-outlook-trace="F:1|T:1" src="cid:459aa13f-e160-424f-98c6-b9752111d410"><br>
</div>
</div>
<div><a href="http://www.sun.ac.za/english/about-us/strategic-documents"><img src="http://cdn.sun.ac.za/100/ProductionFooter.jpg"></a></div>
<br>
<span style="font-size: 11px; font-family: 'Verdana'; color:#9b9f9e;">The integrity and confidentiality of this email are governed by these terms.
<a href="http://www.sun.ac.za/emaildisclaimer ">Disclaimer</a><br>
Die integriteit en vertroulikheid van hierdie e-pos word deur die volgende bepalings bereël.
<a href="http://www.sun.ac.za/emaildisclaimer ">Vrywaringsklousule</a></span>
</body>
</html>