In Fig. 2.5, from the shape of the curves at 1 and 2, and by using eqn. 2.21 ,we can see that and . Therefore . Due to this pressure gradient, the fluid will flow from 1 to 2 and this restores the equilibrium shape of the surface.
Figure 2.5. Stabilizing effect of surface tension
and 
. Therefore 
. Due to this pressure gradient, the fluid will flow from 1 to 2 and this restores the equilibrium shape of the surface.
