What are the forces acting on an air particle along curved streamline(wing upper surface)?
In the inertial frame of the free airstream, the pressure force causes the particle to accelerate inwards. Centrifugal and centripetal forces do not play a direct role; there is no space station wall for centrifugal force to be exerted on, nor to exert a reactive centripetal force. The pressure force acts in the role of the centripetal force shown in the astronaut diagrams. The balancing reactive force is instead another pressure force, which acts on the airfoil where it is known as lift.

In the rotating frame of the air particle, inertial centrifugal force does come into play. The particle must by definition remain stationary within its reference frame, so all forces on it must now balance. The pressure force is thus balanced by the inertial centrifugal force. The airfoil lift no longer plays a direct role within this reference frame (having helped to create it).