strange behaviour for 2nd order hex mesh element
Hello,
I am trying to create a 2nd order hex mesh for my geometry. gmsh is doing something strange. Please see the attached figure.
I have attached my .geo file, which creates a linear mesh. I then use the GUI to create a 2nd order mesh. Then I got the mesh in the attached figure. I am using gmsh 4.11.1. Could you please shed some light on this?
Thanks for your help in advance, Feng ls89.geo