Reading *.msh files (Higher-order curved triangles) in Matlab

Hi,

I need to get the number of nodes, node numbers of each element, boundary edges and nodes of the higher-order triangular elements from Gmsh in Matlab (using load_gmsh4 or by any other method). How can I do that?

Please help.

Thanks in advance.

Smitha

Answer 1

[Tanmay Das]

Hi,

I found a similar question in the MATLAB Central which may solve your problem:

Reading *.msh files (3D) in Matlab. - (mathworks.com)

You may also refer to the following link for further clarification:

Visualizing GMSH .msh file in MATLAB using TRIPLOT - File Exchange - MATLAB Central (mathworks.com)

[Smitha T V]

Hi, Tanmay Visualizing GMSH .msh file in MATLAB using TRIPLOT reads only triangular elements and plots triagular mesh from Gmsh. I want to read and visualize the higher-order curved triangular elements from Gmsh in MATLAB. I looking for help towards that.

Thank you.

[Tanmay Das]

If you use quadratic or higher order meshes, the number of columns in msh.TETs will change, for a quadratic mesh:

elements = msh.TETS10; elements = elements(:,1:10); elements =elements';

This is discussed in comments section of the following question:

Reading *.msh files(3D) in MATLAB

[Smitha T V]

Hi Tanmay,

Thanks for your suggestion, but I am working on 2D curved higher-order triangular elements and not on 3D tetraheral elements. So to be specific, I am seeking help in visulalizing 2D curved higher-order (form cubic order onwards) triangular elements from GMSH in MATLAB. Also, I need to get the number of nodes, node numbers of each element, boundary edges and nodes from these elements from Gmsh in Matlab.

Thanks in Advance.

Smitha