[namandoshi]

i have an area (0.25m^2) inside the room (3*3*3m) i want to give a normal velocity of 5m/s how to give?

i don't know the pressure jump.

[sthapa]

I am new in ANSYS too.. As far I know if u use mass flow rate inlet then there is a option to make it normal to the boundary...
hope this works for u

[namandoshi]

Originally Posted by sthapa

I am new in ANSYS too.. As far I know if u use mass flow rate inlet then there is a option to make it normal to the boundary...
hope this works for u

under which boundary condition?
wall
interior
porous ...
fan

only this are available

and how?

[Kushal Puri]

Originally Posted by namandoshi

under which boundary condition?
wall
interior
porous ...
fan

only this are available

and how?

It will be little tricky you cant apple directly the velocity inlet on the face which is inside the fluid zone. You can follow the following steps.

1. Define -> Boundary Condition. Select interior-5 under Zone and select wall on the right column under Type. Click on Yes to change the type. Two internal walls will be created, wall-5 and wall-5-shadow. ID of wall-5 will be the same as the ID of interior-5. These two new walls will be coupled by default and the available types for them are fan, interior, porous-jump, radiator, and wall.

2. A velocity-inlet type for an internal wall does not exist. In order to have types that can be applied on external zones, they need to be split. How to split wall-5 from wall-5-shadow? In the text user interface (TUI), type: /grid/modify-zones/slit-face-zone wall-5. Two additional walls will be created: wall-5, and another wall-###. A message will print on the cortex window which displays which zone is wall-###. These are now two external zones, one is adjacent to fluid-1 and the other is facing fluid-2. To have the fluid entering the pipe, the one which is adjacent to fluid-1 needs to be changed to velocity-inlet type. To find which one is adjacent to fluid-1, you need to visit the boundary condition panel for that zone and look under 'Adjacent Cell Zone'.

3. Repeat the above procedure to apply pressure-outlet to interior-6.

[ahmed425]

Originally Posted by Kushal Puri

It will be little tricky you cant apple directly the velocity inlet on the face which is inside the fluid zone. You can follow the following steps.

1. Define -> Boundary Condition. Select interior-5 under Zone and select wall on the right column under Type. Click on Yes to change the type. Two internal walls will be created, wall-5 and wall-5-shadow. ID of wall-5 will be the same as the ID of interior-5. These two new walls will be coupled by default and the available types for them are fan, interior, porous-jump, radiator, and wall.

2. A velocity-inlet type for an internal wall does not exist. In order to have types that can be applied on external zones, they need to be split. How to split wall-5 from wall-5-shadow? In the text user interface (TUI), type: /grid/modify-zones/slit-face-zone wall-5. Two additional walls will be created: wall-5, and another wall-###. A message will print on the cortex window which displays which zone is wall-###. These are now two external zones, one is adjacent to fluid-1 and the other is facing fluid-2. To have the fluid entering the pipe, the one which is adjacent to fluid-1 needs to be changed to velocity-inlet type. To find which one is adjacent to fluid-1, you need to visit the boundary condition panel for that zone and look under 'Adjacent Cell Zone'.

3. Repeat the above procedure to apply pressure-outlet to interior-6.

I followed your steps to change an internal face to a velocity inlet. But is it possible that I can get the shear stress along that face ? I don't think I can since it changed to a velocity inlet but I was wondering if there is any way around that

thank you