i want to give me how to eliminate wall shadow , please give me the procedure step by step. best regards

Whats your problem with it? If you have an interface between liquid and solid I don´t think you can eliminate the shadow wall. If you have a shadow wall in your liquid and you want to eliminate it :

define / boundary condition

click on the shadow wall and change type to interior

i have split rectangle with submerged cylindre , then i have got two cylindres, my probleme is situated in the wall of the submerged cylindre , fluent create wall shadow and wall in the submerged cylindre, how to eliminate wall shadow. best regards

I´m not sure about your problem. The wall - shadow-wall is it between your cylinders (crossection) or on the shell.

the wall shadow is created between the submerged cylindre and water(rectangle) , here you have a reactor and cylindre go into a reactor then i have splited reactor with cylindre then you have two cylindres : one submerged and the other is situated at the top of reactor ; i have a probleme with wall shadow in a wall of submerged cylindre. best regards

is the submerged zylinder and the rest of reactor the same material ( water? ) or is on solid and the other liquid?

the submerged cylindre and reactor are solid then the other is water

Either the wall shadow-wall is between the solid and the water. Then I don´t think you can change it. Because also it´s just one wall fluent makes an interface solid and an interface fluid out of it. If the wall shadow-wall is between the solids then you can change it to interior in the define / boundary condition panel.

thank you