[sprasana011]

Hello All,

Can anyone explain what is the difference between conforming and non-conforming mesh?

Thanks

[LuckyTran]

Conforming mesh means when you have an interface between two regions/zones/meshes, that the cell faces are the same for both meshes and that the information can be mapped directly across the interface using an identity transform. Also applies to mapped interfaces within the same mesh such as periodic boundary conditions.

A non-conformal mesh where the two meshes aren't identical means you have to do some interpolating and that generally introduces some (or many) errors. A conformal mesh is preferred, but for complex geometry it may be darn near impossible to produce a conformal mesh every single time. Conformal meshes may also be hard to produce when you have different mesh requirements in each region. For example a fluid zone and a solid zone. The solid zone wants small cells on the diffusive scale of the solid and it would be prohibitive to apply these super small cells to the fluid zone.

If you simply mesh a cube using a polyhedral mesher, it is not a guarantee in general that the mesh on all 6 faces of the cube will be identical. There are additional steps to do.

[reespanau]

Could you help me with this ? Thanks !

Hi Foamers,

I have a very simple question. I ran a channel flow simulation with 950*150*25 grids in streamwise (x), vertical (y), and spanwise (z) direction. After the simulation, I would like to extract the velocity fields at a specific height, e.g., y=50. How can I do that? I know that "sample" utility can do a simple work, but interpolation is always needed. How can I just give a y index and extract the data from specific vertical layer of the grids?

Thanks!