- #1

Roul

- 7

- 0

F

_{L}proportional to V_fx

^{2}?

F

_{D}proportional to V_py

^{2}?

Is this equation of motion for the Y-direction correct here: ma = − mg − F

_{D}+ V(rho)g + F

_{L}

The

**lift force**is because of the horizontal flow which is in fact lifting the particle (lets assume there is some small velocity gradient around the particle, as the particle bottom experiences zero flow velocity and particle top experiences the flow velocity), and the

**drag force**is due to the resistance to the particle's upward motion. Is this correct to say?

Please assume that the picture is correct, and such an observation was made.

Edit: Just added the image.

https://imgur.com/x099TgP

https://imgur.com/x099TgP

https://imgur.com/x099TgP