Calculating the force a floating object receives from the flow
I am interested in calculating the forces (drag and lift) on a floating body.
So, I used ComputeForces to get the force on the floating body in examples/main/12_FloatingWaves.
Looking at Forcefluid.x, I found that the force oscillates at +x and -x. However, considering the direction of the flow, the force in the -x direction seems strange, and looking at the animation and surge values, the floating body was moving in the +x direction.
Isn't this Forcefluid.x a drag force?
And if it is not a drag force, is there any way to calculate drag?
My English is not very good, so I'm sorry if I don't get it.