Hello everyone,

I want to calculate the pressure-distribution on my little house.

But the house is surrounded by trees. The trees have an effect on the

wind-flow, but it makes no sense to model the trees as solids.

I found this article

https://pdfs.semanticscholar.org/a0e6/9 ... fea0e1.pdf

They use darcy-forchheimer law for simulating the windbreak-effect of rows of trees.

Idea: use the porous-zone dialog in the cfd-wb.

But how must I interpret the input-dialog?

Is d=mu/k and f=1/k1 ?

What does the principal-direction mean?

When I estimate the „porosity“ k1 of a tree with 0,5, f=2.0. Is that right?

The vector e2 is missing in porosityProperties-dict.

I set up a turbulent test case, the „tree“ is the pink porous zone. I set the

turbulence-intensity to 15%, so I neglected the linear term in the darcy-forchheimer law.

Which gives zero for d in input dialog. Correct?

Comments welcome

Thomas