Question

what is the reason that kinetic energy is zero and static energy is maximum on the surface of the fluid?

Answer 1

The reason behind your question is the particles of the fluid.

Answer 2

In fluid dynamics, stagnation pressure (or pitot pressure) is the static pressure at a stagnation point in a fluid flow.[1] At a stagnation point the fluid velocity is zero and all kinetic energy has been converted into pressure energy (isentropically). In an incompressible flow, stagnation pressure is equal to the sum of the free-stream dynamic pressure and free-stream static pressure.[2]

Stagnation pressure is sometimes referred to as pitot pressure because it is measured using a pitot tube.