Hello mohamed,
thanks for your answer,
I understood what you meant with - We want to use gmsh2d with Quasi-strucutured which requires a 1D discretization different from the one previously imposed.
and that with the new modified geometry it works,but I don’t understand what makes or not work in one or other geometry, I mean how it can the conflict be removed while fixing the 1D?.
with you approach of ‘cutting the triangular faces’ it actually becomes 100% meshable with simple quadrangulate (and even the hexa meshing easily done with the hexahedron ) and would give an excellent result. as in your other post about the heat exchanger Hexahedral mesh help - #3 by M.KARADANIZ-Phimeca you are dividing the geometry into blocks and applying quasi-structured quad from gmsh. but this does not have a lot of sens, as for a block divided geometry one can simply use quadrangle mapping and get a better mesh quality. what I was looking to use this algorithm is to mesh non-quadrangle faced prisms while respecting the 1D discretization to have a conformal mesh with the rest. to have unstructured hex meshes such as is done in cubit with paving (2D)+sweep(3D) do in salome with quasi-struc quad (2D)+extrusion (3D) so dividing the prism into blocks removes any benefit from the use of unstructured meshes…