Pressure loading on curved

Hai,
How to apply the pressure loading on this curved boundary. I have marked the boundary and exported it to fenics. Loading should be radial to the surface shown.
image

Is those correct way to apply pressure on the marked boundary?

‘Area= assemble(1ds(25))
Traction= (load)/Area
L = Traction
(inner(v, n))*ds(25)’’

Thanks in Adv