Home / Examples / Fluid Analysis [Bernoulli] / Example 8: Swirling Flow in the Cylindrical Pipe
The swirling air flowing in the cylindrical pipe is simulated by the steady-state analysis.
The swirling flows are generated at the inlet of the pipe. The swirling component of the flow is gradually decreasing toward the outlet.
Unless specified in the list below, the default conditions are applied.
Results will vary depending on Femtet version and the PC environment.
Item |
Settings |
Analysis Space |
3D |
Model Unit |
mm |
Item |
Tab |
Settings |
Solver |
Solver |
Fluid analysis [Bernoulli] |
Analysis Type |
Fluid Analysis |
Steady-state Analysis |
Meshing Setup |
Mesh |
General Mesh Size: 3 [mm] |
Creates a cylinder with body. As the boundary conditions, velocity vector and angular velocity are set to the bottom face and natural outflow to the top face.
Body Number/Type |
Body Attribute Name |
Material Name |
0/Solid |
Air |
000_Air * |
* Available from the material DB
Boundary Condition Name/Topology |
Tab |
Boundary Condition Type |
Setting |
Inlet/Face |
Fluid |
Inlet |
Specify flow velocity Direction/Distribution Input (Specify cylindrical coordinates) Axial (inflow) Direction: 100 [mm/s] Angular Velocity: 360 [deg/ s] |
Outlet/Face |
Fluid |
Outlet |
Natural Outflow |
As indicated by the velocity vectors and the streamlines,
the swirling component of the flow velocity are gradually decreasing toward the outlet.
Fig. 1: Flow Velocity of the Swirling Flows (left: vector diagram, right: streamlines)