[Gmsh] Meshing of internal surface loops in 3D (Andrey)

[Louis Gagnon]

Dear Audrey,

In other worlds: a perfect world you would just wish for it and it would
happen, a spiritual world you would pray for it,.. but, read below for
my serious answer :-p

define the inner volume as a volume too. Right know you only define the
volume made of the outside box minus the inside one and that is why the
inside on is not meshed.

Regards,

-Louis




On Wed, 2009-06-17 at 01:07 +0200, gmsh-request at geuz.org wrote:
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> Today's Topics:
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>    1. Re: Volume creation problem (Danny Holstein)
>    2. Meshing of internal surface loops in 3D (Andrey)
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> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Tue, 16 Jun 2009 16:51:08 -0400 (EDT)
> From: Danny Holstein <dgholstein at embarqmail.com>
> Subject: Re: [Gmsh] Volume creation problem
> To: Christophe Geuzaine <cgeuzaine at ulg.ac.be>
> Cc: gmsh at geuz.org
> Message-ID:
> 	<1316304540.168881245185468587.JavaMail.root at md14.embarq.synacor.com>
> Content-Type: text/plain; charset="utf-8"
> 
> Christophe;
> 
> The attached file creates 4 additional points around point 3 (as well as others) that appear to be truncation issues in creating the solid of revolution.  How do I keep that from occurring?
> 
>    ...Dan 
> 
> ----- Original Message -----
> From: "Christophe Geuzaine" <cgeuzaine at ulg.ac.be>
> To: "Danny Holstein" <dgholstein at embarqmail.com>
> Cc: gmsh at geuz.org
> Sent: Sunday, June 14, 2009 3:11:54 PM GMT -05:00 US/Canada Eastern
> Subject: Re: [Gmsh] Volume creation problem
> 
> Danny Holstein wrote:
> > All;
> > 
> > I created what I thought was a closed volume, but GMSH doesn't agree.  I've attached the offending file, does anyone know why it's not working?
> > 
> 
> It looks like your volume is not closed: see e.g. lines 29 and 272.
> 
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> ------------------------------
> 
> Message: 2
> Date: Wed, 17 Jun 2009 02:47:08 +0400
> From: Andrey <spiritualworlds at mail.ru>
> Subject: [Gmsh] Meshing of internal surface loops in 3D
> To: gmsh at geuz.org
> Message-ID: <4A3820EC.5060209 at mail.ru>
> Content-Type: text/plain; charset="utf-8"
> 
> Dear GMSH community!
> 
> I try to state my question.
> 
> For this purpose I prepared a simple geometry in attached boundary.geo.
> 
> The geometry is a surface in 3D space and consists of two rectangular boxes:
> 
> External box of size 2x2x2 and internal box of size 1x1x1.
> 
> The last one is fully located inside the first.
> 
> If I pass this geometry to gmsh and ask it to make a 3D mesh of the volume:
> 
> gmsh.exe -3 boundary.geo -o mesh.mesh -format mesh -order 1 -algo iso 
> -optimize
> 
> then I get a 3D-mesh of the space between 1-st and 2-nd boxes, the space 
> inside small box remains empty. Changing the orientation of internal box 
> surface I hope to get the space inside small box also meshed but fail. 
> See attached meshed_boxes.png
> 
> In other worlds: how to change boundary.geo to force gmsh to mesh 
> interior space inside internal surface loop?
> 
> Note, that the problem doesn?t exist for 2D meshes ? changing the 
> orientation of internal line loop it is possible to get interior place 
> meshed or non-meshed.
> 
> Best regards,
> 
> Andrei
> 
> 
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> End of gmsh Digest, Vol 77, Issue 27
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