Quadratic Triangle Mesh Generator

[Ronaldenses]

Hello Dear Engineers.

I need to generate a quadratic triangle mesh.
Anyone know some freetool like a executable or fortran code available on Internet?

Thank you very much

 

[rb1957]

do you mean a mesh for TET10s ?

another day in paradise, or is paradise one day closer ?

 

[Ronaldenses]

A mesh generator for 2D quadrilatic triangle. This means 6 nodes, I know that exist one tha name is Triangle but the mesh generated dont have good quality
Do you know another tool?

 

[GregLocock]

Is there a reason why a 3 node triangle generator could not be used, and then insert mid side nodes automagically?

That is, does the optimum 6 node triangle have straight edges anyway?

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376

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[Ronaldenses]

Triangle dont generate 3 nodes tryangle and then put the others in the middle of element, it sometimes generate to much elements and it is impossible to control the number of nodes.

I just need a simple mesh, doesnt matter the geometry of the edges, just need a good quality mesh. 3 nodes generator exist a lot of programs but 6 nodes i didnt find.

 

[rb1957]

I'm with greg ... most pre-processors (like FeMap and PATRAN) mesh with the basic shape, in this case triangles, and then add the mid-side nodes (since these are determined by the vertices) and update the element connectivity.

another day in paradise, or is paradise one day closer ?

 

[Ronaldenses]

Yes but this method is bad, because you are duplicating the number of nodes each mesh

 

[IDS]

Yes but this method is bad, because you are duplicating the number of nodes each mesh

Can you explain in more detail what you see as being a problem here?

Doug Jenkins
Interactive Design Services

http://newtonexcelbach.wordpress.com/

 

[Ronaldenses]

I just need a mesh generator for 2D quadratic triangle mesh, like a open source. It can be a executable or similiar. I give a boundary to generator and result a good quality quadratic mesh.

If the generator produce a linear triangle and the put the other nodes in the middle of the element, the generator are duplicating the number the nodes and it can produce to much nodes that my program will spend to much time to solve.

 

[rb1957]

"Yes but this method is bad, because you are duplicating the number of nodes each mesh" ?

any good pre-processor will understand that there is an adjacent element with a similar mid-side node and it should apply the same node to both elements.

else you can "equivalence" the nodes (co-incident nodes check) and get the two nodes merged, and then if you Really want you can condense the node numbering (so you don't have gaps).

"I just need a mesh generator for 2D quadratic triangle mesh, like a open source." ... ahhh ! you're trying to "kluge" together your own pre-processor ... yeah, sorry, can't help you with that. but if you have a triangle mesher, then the mid-sides are easily calculated, and the co-incident nodes easily determined (I mean, each side will be on one or two elements).

another day in paradise, or is paradise one day closer ?

 

[Ronaldenses]

Thank you all for your inputs.