[Gmsh] Defining Mesh
Mikhail Artemyev
artemiev.mikhail at gmail.com
Tue Mar 17 17:00:44 CET 2015
Please, have a look at the tutorial 13
http://geuz.org/gmsh/doc/texinfo/gmsh.html#t13_002egeo
I think it describes exactly what you want to achieve.
Best,
Mikhail
On 03/17/2015 10:44 AM, Thomas Bernhardt wrote:
> This works if I want the mesh to be as small as the smaller of the
> meshes across the surface but what if the mesh is too small and I want
> it to be the size of the larger?
>
> On Tue, Mar 17, 2015 at 9:22 AM, Mikhail Artemyev
> <artemiev.mikhail at gmail.com <mailto:artemiev.mikhail at gmail.com>> wrote:
>
> Here is a quick and dirty solution:
>
> // --- scalpel2.geo ---
> Merge "scalpel2.step";
> Mesh.CharacteristicLengthMax = 2;
> Mesh.Algorithm = 1; // MeshAdapt
>
> The picture of the mesh I got is attached.
>
> Best,
> Mikhail
>
>
>
> On 03/17/2015 09:54 AM, Thomas Bernhardt wrote:
>> 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 <mailto: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
>>> <mailto: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
>>> <mailto: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
>>> <mailto: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 <mailto: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
>>> <mailto: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 <mailto: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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>>> > U.S.C. Section 2510-2521 and may be legally
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>>> > received this transmission in error, please notify
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>>> > immediately by return e-mail or by telephone at
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>>> contained herein is
>>> > confidential information provided only for the use
>>> of the individual or
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