Boundary layer separation, fluid flow losses, efficient control of fluid flow over a solid etc. are complex problems faced by engineers and technocrats. This invention provides a remedy over these problems. The invention provides a Process of making surface energy gradients to solve all above mentioned problems. Invention also provides a Tool of a Sticker having surface energy gradient (in appropriate direction) on it. With the surface energy gradient (in appropriate direction) the fluid could be made to adhere/detach the solid-body, direct the fluid in required direction and accelerate/decelerate fluid while flowing/moving over a solid-body. The tool of a Sticker S a self-adhesive sheet/lamina, is to be pasted on the real solid-body. The Sticker S is a sheet/lamina of an adhesive material (plain adhesive substance or adhesive substance mixed with the particles or filaments) having 2 surfaces A and Y. The surface A could be wrapped into a wrapper (of any type) to protect it before its use or in between its different usages. The surface A is to be made in contact with the vapour/gas. The surface Y is sticky in nature and is used to paste the Sticker S to the real solid-body. The surface Y is covered with a lid L. While making the use of this Sticker S, the lid L is removed, the surface Y is pasted on the real solid-body and the surface A is made in contact with the fluid. Surface A of the Sticker S is having the surface-sections like squares by means of which surface energy gradient (in appropriate direction) is formed to yield the desired result mentioned above. With the help of this Process and Tool of surface energy gradient, the fluid could be adhered/detached, directed, controlled, accelerated/decelerated by incorporating surface energy gradient (in appropriate direction). Provided solutions are economical, efficient and are easier and simpler to operate.
