gmsh mesh
 

hi everybody

I need to solve the flow over a sloping bed in a 3D mesh.
I therefore need the cells at the boundary wall to be as rectangular as possible.
when i generate the mesh i obtain only vertical lines in my depth direction and this results in a highly skewed mesh.

how can i tell the program that i want all the angles of the cell to be as perpendicular as possible?
Is there any command in gmsh that can do this?

thanks

Can you attach your .geo file, so we can see the exact geometry. Then it will be easier to give some advice.

thanks

i attached the file.
as you can see I have a highly skewed mesh.
and i want to have the cells at the bottom boundary layer to be rectangular and not rhomboid.

is there any algorithm i can use??

I don't know if I understand you correctly, but if you use Recombine Surface, you get mesh like this
http://s9.mojalbum.com/17371839_1744...19166917_z.jpg

Thanks.

I explained myself badly... sorry!
Lets try to explain it with a picture. You can find that attached.
The vertical direction in the figure represents the z axis.
As you can see my actual mesh(left) has the boundary cells rhomboid shaped at the bottom (i am simulating a boundary layer flow so i need cells to be rectangular)

I want to have them as rectangular as possible like in the sketch i made (right).

I now did Recombine Mesh and my mesh is now uploaded (attached).