<div style="line-height:1.7;color:#000000;font-size:14px;font-family:Arial"><p class="MsoNormal" align="left" style="line-height: 16.25pt;"><span lang="EN-US" style="font-size:12.0pt;font-family:"Times New Roman",serif;

mso-fareast-font-family:ثخجه;mso-font-kerning:0pt">To whom it may concern,</span></p><p class="MsoNormal" align="left" style="line-height: 16.25pt;"><span lang="EN-US" style="font-size:12.0pt;font-family:"Times New Roman",serif;

mso-fareast-font-family:ثخجه;mso-font-kerning:0pt">Hello! I am

a user of Gmsh and I've been using it for my research for a long time in the

field of computational electromagnetics. Thank you for your contribution to

this application!</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;

font-family:"Arial",sans-serif;mso-fareast-font-family:ثخجه;mso-font-kerning:

0pt"><o:p></o:p></span></p><p class="MsoNormal" align="left" style="line-height: 16.25pt;"><span lang="EN-US" style="font-size:12.0pt;font-family:"Times New Roman",serif;

mso-fareast-font-family:ثخجه;mso-font-kerning:0pt">Here I have two

questions regarding Gmsh. <b>First,</b> I've already known that the 2D surface will be

meshed into triangles and the 3D volume will be meshed into tetrahedrons in

Gmsh. When a 3D volume is in touch with a 2D surface, they will share a

certain face. Just on this interface, rather than the mesh shown in Fig.1,

could you possibly make the triangles in the meshed tetrahedrons match up with

those in the meshed surface like Fig.2 maybe through some appropriate settings? <b>Second,</b>

how can I translate a closed surface (e.g. a spherical surface) into a volume

(e.g. a solid sphere)?</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;

font-family:"Arial",sans-serif;mso-fareast-font-family:ثخجه;mso-font-kerning:

0pt"><o:p></o:p></span></p><div style="line-height: 16.25pt;"><span lang="EN-US" style="font-size:12.0pt;font-family:"Times New Roman",serif;

mso-fareast-font-family:ثخجه;mso-font-kerning:0pt">This question is really

important for my ongoing research. Could you please answer it when you're free?

Thank you so much. Looking forward to your reply.</span></div><div style="line-height: 16.25pt;"><span lang="EN-US" style="font-size:12.0pt;font-family:"Times New Roman",serif;

mso-fareast-font-family:ثخجه;mso-font-kerning:0pt"><br></span></div><div style="line-height: 16.25pt;"><span lang="EN-US" style="font-size:12.0pt;font-family:"Times New Roman",serif;

mso-fareast-font-family:ثخجه;mso-font-kerning:0pt"><img src="cid:1860b3d6$1$15525d0ea1f$Coremail$liujinbo005$163.com" orgwidth="524" orgheight="467" data-image="1" style="width: 524px; height: 467px;"></span><img src="cid:74beb31a$2$15525d0ea1f$Coremail$liujinbo005$163.com" style="line-height: 1.7; width: 770px; height: 775px;" orgwidth="770" orgheight="775" data-image="1"></div><div style="line-height: 16.25pt;"><span lang="EN-US" style="font-size:12.0pt;font-family:"Times New Roman",serif;

mso-fareast-font-family:ثخجه;mso-font-kerning:0pt">                                                       Fig.1      Mismatched meshes on the interface</span><span style="font-family: 'Times New Roman', serif; font-size: 12pt; line-height: 16.25pt;">                                                                      Fig.2 Matching meshes on the interface       </span></div><p class="MsoNormal" align="left" style="line-height: 16.25pt;"><span lang="EN-US" style="font-size:12.0pt;

font-family:"Times New Roman",serif;mso-fareast-font-family:ثخجه;mso-font-kerning:

0pt"> Regards</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;font-family:"Arial",sans-serif;mso-fareast-font-family:

ثخجه;mso-font-kerning:0pt"><o:p></o:p></span></p><p class="MsoNormal" align="left" style="line-height: 16.25pt;"><span lang="EN-US" style="font-size:12.0pt;

font-family:"Times New Roman",serif;mso-fareast-font-family:ثخجه;mso-font-kerning:

0pt"> Edward Liu</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;font-family:"Arial",sans-serif;

mso-fareast-font-family:ثخجه;mso-font-kerning:0pt"><o:p></o:p></span></p><p class="MsoNormal" align="left" style="line-height: 16.25pt;"><span lang="EN-US" style="font-size:12.0pt;font-family:"Times New Roman",serif;

mso-fareast-font-family:ثخجه;mso-font-kerning:0pt">Beijing Institute of Technology</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;font-family:"Arial",sans-serif;mso-fareast-font-family:

ثخجه;mso-font-kerning:0pt"><o:p></o:p></span></p><p class="MsoNormal">

</p><p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;mso-bidi-font-size:

11.0pt;font-family:"Times New Roman",serif"> </span></p></div>