creation of fluid geometry
 

How to create the geometry of moving fluid (air) between the two walls (one having plane surface and other having grooved surface) in fluent? please reply me as soon as possible.

fluent is not for generating geometries.

you need to generate the geometry, and MESH the geometry, in other programs, before you import it into Fluent.

Ansys Workbench has programs for this, or you can use other CAD programs and import the geometry.

Fluid geometry
 

Actually moving fluid (air) does not have particular geometry then how can i create a geometry and which software i have to use to create fluid model

that is single fluid between both geometries. I am sure you do not to put any extra effort for that. It is already there.

creation of the fluid(air) geometry
 

sir please tell me the procedure. I put lot of efforts but i couldnt able to create the geometry so please inform me clearly sir.