Overall I think we need more discussion for Figs 5 & 6. For fig 5, maybe a discussion on stall delay and why Re independence is not achieve is sufficient. Fig 6, need to find something to say, e.g. (1)why the trends look like that, is this expected? (2)Why they don't differ much between each other. (3) mention that CD increases with ReD.
From @bgunawan: