Periodic Boundary conditions

[Bkv-1915]

Hi. Can anyone please tell me how to generate 3D random fields inside a box with periodic boundaries along x and z directions and walls along y. The incompressible flow is along x.

[LSchueler]

Hi, did you have a look at the Fourier method for generating SRFs? Here is an example, where we set the periodic length of the field to half the domain length. If you set your periodic length to e.g. (x, 2*y, z), with x, y, z being the domain lengths in their respective direction, you should get what you want.