Learning Forum

[Rob]

I have no idea about the structural part.

However, for a tree you need to consider what is going on in the leafy bit. A tree is optically thick (you can't see through it), has a range of flexible and solid parts (leaves, twigs and branches) and may be mostly air. This makes estimating resistance coefficients to be quite difficult, and also consider if leaves move do those coefficients vary with wind speed. Luckily some work has been done in this area, and that included dragging lumps of tree into a wind tunnel. So, I advise doing a literature review for more data, and maybe searching for porous tree on here.