sir i m doing a problem in which one boundary has a velocity normal to its surface is there any possibility of giving such a condition in fluent if possible please tell me how to model this type of boundary condition ramesh

Unfortunately no. I had the same problem. You can only set a tangential velocity ot use the dynamic mesh. Luca

can you send me your problem

Hi wanted to use transpiration velocity for aeroelastic analysis of a wing. Fluent ignores the normal component velocity and accepts only the tangential one. Maybe you could try using the velocity inlet profile instead of a wall but you shuld make sure it works well. This condition may work only with the segregated solver if you want to model an inlet or outlet velocity (see the guide). Luca

Greetings! I have some experience of modelling of free vertical fluctuations of the Vertical cylinder on border of the unit of phases water - air. The bottom and top end faces of the cylinder thus move on a normal on distance of m from ÿ the cylinder. I think, that it approximately that interests you. Can state the problem(task) on mine more in detail anatoly46@gtn.ru. Anatoly.

[mhs]

Originally Posted by Anatoly
;119481

Greetings! I have some experience of modelling of free vertical fluctuations of the Vertical cylinder on border of the unit of phases water - air. The bottom and top end faces of the cylinder thus move on a normal on distance of m from ÿ the cylinder. I think, that it approximately that interests you. Can state the problem(task) on mine more in detail anatoly46@gtn.ru. Anatoly.

Hi Anatoly
I want to simulate a cylinder that has an axial moving in a non-newtonian fluid.
from one end of cylinder, there is an exhaust of fluid (B.C : velocity inlet ). how can I set this condition that a surface (one end of cylinder) with velocity inlet B.C, can move in a line with given velocity?

best regards
mhs