[Gmsh] 3D non-uniform meshing

[jeremy theler]

http://gmsh.info/doc/texinfo/gmsh.html#t10_002egeo

--
jeremy theler
www.seamplex.com

On Sun, May 31, 2020, 03:56 Tian Xia <tianxia.ui at gmail.com> wrote:

> Hi Jeremy,
>
> Thanks for directing me to the documentation. I can see my first
> question answered there. But I still can't see a clear way to create a mesh
> like this:
>
> If I'd like to mesh a box in this way: the surface closed to the eight
> corners (for example, distance=1) need to be densely meshed (lc0), other
> part of the surface needs to be meshed with lc1. Inside the volume, it can
> be meshed as coarse as possible. Is there a way to do that in Gmsh? (
>
> More generally, Can I define the surface mesh density and volume mesh
> density separately?
>
> Thank you,
> Tian
>
>
> On Sat, May 30, 2020 at 3:35 AM Jeremy Theler <jeremy at seamplex.com> wrote:
>
>> http://gmsh.info/doc/texinfo/gmsh.html#Specifying-mesh-element-sizes
>>
>> On Sat, 2020-05-30 at 00:21 -0700, Tian Xia wrote:
>>
>> Hi Gmsh developers,
>>
>> Thank you for developing this extremely useful tool. Recently I have
>> encountered a couple of problems about generating 3D non-uniform mesh:
>>
>> 1. If I define a background (for example threshold) field and define the
>> lc for an object using "Characteristic Length{ PointsOf{Volume{1};} } =
>> lc;", the mesh size in the volume 1 will have two mesh size definitions.
>> How will Gmsh treat this this? Will it just use the smaller lc or overwrite
>> one of these?
>>
>> 2. If I'd like to mesh a box in this way: the surface closed to the eight
>> corners (for example, distance=1) need to be densely meshed (lc0), other
>> part of the surface needs to be meshed with lc1. Inside the volume, it can
>> be meshed as coarse as possible. Is there a way to do that in Gmsh?
>>
>> Thank you for your help!
>>
>> Bet regards.
>> Tian
>>
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>
>
> --
> Tian
>
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