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<p style="margin-top:0;margin-bottom:0">Hi,</p>
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<p style="margin-top:0;margin-bottom:0">Yesterday I realised this .geo file had some errors, because I forgot to define some volumes. I checked everything but I am still struggling trying to generate the quadrangular structured mesh. I have just sent you an
email with my updated .geo file. </p>
<p style="margin-top:0;margin-bottom:0">Hope you can help me,</p>
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<p style="margin-top:0;margin-bottom:0">Thanks in advance,</p>
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<p style="margin-top:0;margin-bottom:0">Cristina</p>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>De:</b> Hernandez Pereira, Cristina<br>
<b>Enviado:</b> martes, 26 de junio de 2018 9:54:35<br>
<b>Para:</b> gmsh@onelab.info<br>
<b>Asunto:</b> Structured mesh between two volumes (one inside another)</font>
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<p style="margin-top:0; margin-bottom:0">Hi, my question may be basic but I am new to Gmsh, so hope you can help me.</p>
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<p style="margin-top:0; margin-bottom:0"><span style="font-size:12pt">I want to build a cubic domain with a rounded box in the middle. The inner box has to be empty (no mesh inside), whilst the space between the domain and the cube needs to have a structured
mesh. I would then use the mesh and geometry for an OpenFOAM case, simulating the air flow around the inner box, which is an obstacle.</span></p>
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<p style="margin-top:0; margin-bottom:0"><span style="font-size:12pt">I have tried to adapt the transfinite <span style="font-family:Calibri,Helvetica,sans-serif,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols; font-size:16px">example </span>(located
in <span style="font-family:Calibri,Helvetica,sans-serif,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols; font-size:16px">demos\simple_geo\transfinite </span>from version 3.0.6 of gmsh) that has
a cube and a sphere inside. However, in my case, when I define the surfaces around the inner rounded cube by doing Line Loop and then Plane Surface, the surfaces that are created are not correct and, thus, I cannot continue using the commands Surface Loop
and Volume to create the connection volumes. Please find attached the .geo file.</span></p>
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<p style="margin-top:0; margin-bottom:0"><span style="font-size:12pt">I think it could be related with the definition of the faces in the rounded cube, because they seem to be weirdly built.</span></p>
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<p style="margin-top:0; margin-bottom:0"><span style="font-size:12pt">Can anyone hlep me with this?</span></p>
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<p style="margin-top:0; margin-bottom:0"><span style="font-size:12pt">Thanks in advance,</span></p>
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<p style="margin-top:0; margin-bottom:0"><span style="font-size:12pt">Cristina Hernandez</span></p>
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