Re: [vmtk-users] cylinder mesh with boundary layer

[Arjan G. <aj...@gm...>]

Hi Jan,

Try vmtksurfaceremeshing instead of vmtksurfacetriangle before generating
the volumetric mesh. The large aspect ratio of the triangles is likely what
throws off vmtkmeshgenerator.

Arjan


On Wed, Feb 27, 2013 at 9:31 AM, Jan Helmig <jan...@ho...> wrote:

> Hi,
>
> I am trying to create a cylinder mesh with boundary layer cells. The
> created mesh looks fine except the fact that there is no boundary layer
> created. As a starting point I use an open, non-capped cylinder surface
> created with DOLFIN (attached to the mail). Then I use the following
> commands.
>
>     vmtk = []
>
>     outfile = "cylinder.xml"
>     outfiles.append(outfile)
>
>     vmtk.append("**vmtksurfacetransform -ifile cylinder.vtp -rotation 0.0
> 0.0 90.0 -translation 0.0 %f 0.0" %float(height/2))
>     #vmtk.append("**vmtksurfaceviewer")
>     vmtk.append("**vmtksurfacetriangle")
>
>     # Mesh generator (comment out unwanted lines)
>     cmd = "vmtkmeshgenerator"
>     cmd += " -edgelength %f" %0.11
>     cmd += " -maxedgelength %f" %(1.2*0.12)
>     cmd += " -minedgelength %f" %(0.8*0.12)
>     cmd += " -boundarylayer 1"
>     cmd += " -thicknessfactor 0.1"
>     cmd += " -tetrahedralize 1"
>
>     vmtk.append(cmd)
>
>     vmtk.append("vmtkmeshwriter -entityidsarray CellEntityIds")
>
>     vmtk = " --pipe ".join(vmtk)
>     vmtk = vmtk+" -ofile %s" %outfile
>     print vmtk
>     subprocess.call(vmtk, shell=True)
>
>
> Does anybody understand why there is no boundary layer created?
> Maybe it has something to do that the surface consists out of very
> stretched triangles after the command "vmtksurfacetriangle".
>
> Thanks a lot in advance,
> Jan
>
>
>
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