[Vino]

Hi ,

I am exploring CGNS data structure for my research work. I am looking for some example files/tutorials of CGNS which can handle multi block hybrid grids, (i.e. both triangular and quadrilateral grid in case of 2D). In CGNS site , its not available for for the case of hybrid grids. Looking for your suggestions.!!!

Thanks in Advance.

[t.teschner]

i have done some extensive work with CGNS, also for my own fluid solver i used CGNS for mesh reading (2D), all based on unstructured meshes. If you want to combine tri and quad elements, as far as I can tell, you have to use an unstructured mesh (of course you can always handle hexa elements in an unstructured manner, in fact that is what i am doing in my code, but you can't have structured grids, or multi block grids in that manner, with tri elements).

if you want to have a look at my mesh reading, i've uploaded the file here:
http://www.siteless.de/cfdonline/cReadMeshPOINTWISE.cpp

first i am reading the mesh normally, then i get the boundary conditions and afterwards i get the elements in the method getElements(). For the moment I am only interested in quad and bar elements (2D structured meshes therefore, ignore for the moment what i am doing afterwards with those elements, that's just some lattice boltzmann specific stuff i have to do) but I also gave the commands for reading tri/tetra and hexa elements. all that is done in an unstructured manner and if i remember correctly i also tried reading those elements which was working fine.

let me know if you have any further questions

[Vino]

Thank you for your reply Tom-Robin Teschner.!!! This code is very useful to me. Once again Thanks.!!!