Dear users,
The package version that I am using is ver. 3.3. Now I am having some trouble understanding some details of the LB code.
Suppose I want to construct a slit channel with a height H. Where should I set up the walls?
My understanding is that the LB nodes are placed at the half-integer positions in terms of agrid. Therefore,
the bottom wall should at a position higher than 0.5 agrid, say dis=1. Otherwise, there will be no boundary nodes,
which may cause a breakdown I guess. The top wall should locate at 1+H, so that I will have a channel with a height=H.
Suppose the walls are in the y direction. Only the fluid nodes at (x,y,z)=(x,0,z) are boundary nodes. Is my understanding correct?
Best Regards,
Chih-Tang