[Gmsh] Defining Mesh

Tue Mar 17 15:54:39 CET 2015

The original scalpel is present in the .step file and in the .geo file I
have defined one compound surface. My goal is to be able to have a uniform
mesh throughout that compound surface.  The end goal is to have a process
for making uniform meshes across surfaces that are one surface but divided
on a CAD model.  Thanks for your help.

On Tue, Mar 17, 2015 at 8:46 AM, Mikhail Artemyev <
artemiev.mikhail at gmail.com> wrote:

>  Hi Thomas,
>
> If you share that example of a scalpel with Compound Surfaces that you
> defined, I can try and show what can be done.
>
> Best,
> Mikhail
>
>
>
> On 03/17/2015 09:18 AM, Thomas Bernhardt wrote:
>
> Can you give me an example of how I can change the mesh sizes in practice?
> Where do I change that option?
>
> On Thu, Mar 12, 2015 at 9:43 AM, Mikhail Artemyev <
> artemiev.mikhail at gmail.com> wrote:
>
>>  Hi Thomas,
>>
>>  I would suggest to play with the size of the mesh cells. There are
>> several ways:
>> http://geuz.org/gmsh/doc/texinfo/gmsh.html#Specifying-mesh-element-sizes
>>
>>  Best,
>>  Mikhail
>>
>>
>>
>> On Thu, Mar 12, 2015 at 10:05 AM, <
>> gmsh-request at ace20.montefiore.ulg.ac.be> wrote:
>>
>>> Hello,
>>> In this picture the top is the original mesh of the scalpel. In the
>>> bottom
>>> I defined some compound surfaces. The mesh changed but the problem is
>>> that
>>> even in the one compound surface the mesh goes from point to point and is
>>> smaller in the areas where there used to be a smaller surface. I would
>>> like
>>> to be able to have a uniform mesh across surfaces.  Does this make the
>>> problem clear?  Thanks for your help.
>>>
>>> On Wed, Mar 11, 2015 at 9:51 AM, David Bernstein <
>>> David.Bernstein at meliorinnovations.com> wrote:
>>>
>>>  >  Hi Thomas, I?m sorry but I don?t understand your problem.  It would
>>> be
>>>
>>> > helpful if you could post a small example.
>>> >
>>> >  Dave
>>> >
>>> >   On Mar 10, 2015, at 10:14 AM, Thomas Bernhardt <
>>> tzbernhardt at gmail.com>
>>> > wrote:
>>> >
>>> >  I am finding that I can define a compound surface and instead of a
>>> bunch
>>> > of separate meshes it treats it as one mesh but the points from the
>>> > original surface divisions remain.  So the problem is that the mesh is
>>> > defined based on points. The one mesh is the same as the original
>>> broken up
>>> > meshes. The mesh will still be smaller on the part of the compound
>>> surface
>>> > that used to be a smaller surface because points are closer together.
>>> Any
>>> > fix for this? Thanks for your help!
>>> >
>>> >  Thomas Bernhardt
>>> >
>>> > On Tue, Mar 10, 2015 at 10:23 AM, David Bernstein <
>>> > David.Bernstein at meliorinnovations.com> wrote:
>>> >
>>> >> Hi Thomas, Take a look at the Compound Line/Surface/Volume entities in
>>> >> Gmsh.  These will probably do what you want.
>>> >>
>>> >> Regards,
>>> >> Dave
>>> >>
>>> >>
>>> >> > On Mar 10, 2015, at 7:42 AM, Thomas Bernhardt <
>>> tzbernhardt at gmail.com>
>>> >> wrote:
>>> >> >
>>> >> > Hello,
>>> >> > I am trying to create a mesh in gmsh of a model that I have
>>> imported.
>>> >> The problem that I find is that every line in the model divides the
>>> mesh.
>>> >> Is there a way to mesh the whole surface as one body ignoring the
>>> lines
>>> >> that divide parts. For example on a simple aircraft model there will
>>> be a
>>> >> line dividing the metal surface from the glass of the cockpit.
>>> However,
>>> >> when defining a mesh I want to ignore this division and treat it as
>>> one
>>> >> single surface. Thanks for any help you can provide.
>>> >> >
>>> >> > Thomas Bernhardt
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