Re: [iso2mesh-users] Issue with remeshsurf

[Qianqian Fang]

On 05/22/2018 05:15 AM, newbie_iso2mesh wrote:

Dear Dr. Fang and iso2mesh users,

I have a tetrahedral mesh of 3D model(abaqus input file), from which I extracted all the node co-ordinates(v) manually. Also, I extracted the surface patches of the volume using the function 'volface'. Please refer the figure which I obtainied from 'plotmesh (v,openface)'

As I want to increase the quality of mesh, I'm trying to remesh the obtained surface using the function 'remeshsurf'. But, I am getting holes (or) there is no mesh at certain locations in the output (please see the attached figure 'remeshsurf_elemsize_0.5').  I tried with different elemsize but it is not working. This is how I used remeshsurf:

remeshsurf only works with closed surfaces. your input surface has open-edges,
so in theory, it should not work.

from looking at your input mesh, it looks like the nodes are aligned on a grid,
can you sort your node x/y to make it a 2D grid, and do a simple 2D interpolation?

elemsize=0.5;

[newno,newfc]=remeshsurf (v,openface,elemsize);

plotmesh(newno,newfc);

Anyone has an idea how to fix this issue? Any help would greatly be appreciated. Thanks in advance. 

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[newbie_iso2mesh]

thanks a lot for the reply Dr. Fang

[newbie_iso2mesh]

Dear Dr. Fang, 

The mesh was obtained from 2D interpolation like you said! But the aspect ratio of the elements was too high (or) mesh-quality was not so good. As it is complicated to do an adaptive mesh-refinement (or) to increase the quality of the mesh by other alternatives, I think iso2mesh  toolbox (which is amazing) will be easier. I kindly would like to know the Workflow you would suggest. 

On Wednesday, May 30, 2018 at 9:29:18 PM UTC+2, q.fang wrote: