[RobertHB]

Hello together,

According to de Villiers (2006), when using cyclic boundary condition in a plane channel flow the model dimensions should be restricted to a minimum of 4h*2h*2h length units in stream-wise and span-wise directions. This is supposed to ensure that the turbulence structures of the flow fit into the domain.

Now, my domain resembles a plane channel flow, but is only bounded by one plane (the lower boundary in an implementation of a solid topography) and my top boundary holds a slip condition. Furthermore, due to the scale of my domain (4*2*2 µm) i do not observe any turbulence of the flow.

Question: When using cyclic boundary conditions for my case, do i need to stick to the above given restrictions to achieve a meaningful result, or do the dimension restrictions only apply to simulation which are supposed to simulate turbulence?

With regards,
Robert