Dear Mr.Ashwani Verma

Greeting

you can return to the design of body's like cars and wing of plane where there are many technique are employed to delay the eddies and make the boundary layer more uniform sometimes by using (rotating rolls ) rotate with the direction of fluid flow to make the separation more uniformly.

you can return to

- TURBULANCE by (Uriel Frisch)

- Turbulence in Fluids by (Marcel Lesieur) (this reference have a wonderful technique )

-MEHANIKA FLUIDA by (PETO IZDANJE

with my respect

I'm assuming fluid passes horizontally not vertically over a vertically situated plate. Are you trying to fully wet or avoid wetting the plate?

Ships try to avoid hull wetting to reduce drag-friction (form drag). They use combinations of textured surfaces and/or surface injected air bubbles.

Flow uniformity over surfaces relates to laminar or turbulent flow. Laminar flow provides full contact over surface. But as flow goes turbulent, which happens at given downstream distances from a leading plate edge, it will detach from surface and create randomly swirling behavior which reduces wetting and adds to its drag. Keeping a plate, fin or ship hull within laminar flow regime where flow never leaves surface and makes good contact typically requires flow design aides. One way is to perforate plate surface with micro-holes that sucks flow in and keeps it attached thusly fully wetting plate. Conversely if you blow air through those holes they will form a slip-stream over which the liquid will skim over to reduce form-drag.

Single phase injection fluids like air-to-air are also used. STOL aircraft use luvered airflow injection over wings to avoid the onset of turbulent flow separation that reduces lift. Wing surface suction is also used to stop flow surface separation.

Textured surfaces are good for laminar flow wetting in which the textures help spread and keep flow uniform.

The Coanda effect can also help to keep laminar fluid flows down and uniformly spread over surfaces. Here you would have a jalousied surface to attract flow.