Hello to everybody,

i’m developing the lid driven cavity case with LBM method using the velocity boundary conditions proposed by Hecht and Harting in their article (http://arxiv.org/pdf/0811.4593.pdf), but i’ve some doubts.

- the equation (29) , with correction (32), has to be applied on each distribution functions pointing in the domain, considering the reference system of the above-mentioned article, in particular the edge between xy-plane and yz-plane we have to modify f15,f5,f17,f9,f7,f1,f8,f9?
- in the article there is a distinction between convex and concave edges, so my question is the edges of a 3d-square duct are convex, aren’t they?
- moreover in the article they suggest to perform as first step, the streaming step, and as second step, the collision step. Do something change if i modify the order, that’s to say i perform the collision step and then the streaming step?

Thanks for the answers.