Mesh for ogee spillway
 

Hi to all friends
I have a ogee spillway geometry and i generate the stl file from it.but the size of it confused me in suitable meshing.Now i have a qustions if i use 2 mesh block is better than 1? How can arrange the cell aspect ratio in excellent range?I will send stl file to you, please help me.Thank you so much.

I would probably stick to one mesh block option with some solid/domain removing component to cover some void region and reduce the active cell number.

as for the cell aspect ration, probably as uniform as possible.