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I am studying a paper and According to the following sentences and picture, I want to know that the strong downward flow is created by separation vortex or separation vortex is created by the strong downward flow???
Figure 11 shows an illustration of the flow structure obtained by
the present numerical simulation. At high angles of attack a separation vortex(2) appears on the blade suction surface in the hub
side to reduce the blade circulation, because of the excessive
angle of attack near the hub. A strong downward flow(3) is induced by the separation vortex near the trailing edge. It brings
about the clockwise vortical wake flow(4a), which enlarges the
flow separation on the adjacent blade suction surface(4b).
Last edited by ali_dd; 01-Jun-2016 at 14:05.
The vortex creates the flow. The flow is induced by the vortex.