Flow Velocity—Creo Simulation Live
When defining a fluid simulation study, the flow velocity at the inlet is one of the required boundary conditions. The Flow Velocity command is available on the Boundary Conditions group when a fluid simulation study is active.
To Define Flow Velocity
1. Click > . The Fluid Flow Velocity dialog box opens.
2. Specify a name for the boundary condition, or use the default name. Click the color swatch adjacent to Name to change the color of the icon, the distribution, or the text displayed for the boundary condition.
3. Select the surfaces at which to apply the flow velocity boundary condition. Your selection appears in the Surfaces collector.
4. Select one the following options to define the magnitude and direction of flow velocity:
◦ Magnitude and direction—Specify the value of the unit vectors for direction by typing a value of 0, 1 or -1 in the X, Y, or Z field.
Alternatively click 
and select a linear edge or planar surface to specify the direction of velocity. The value of the unit vector appears in the X, Y, or Z field.
and select a linear edge or planar surface to specify the direction of velocity. The value of the unit vector appears in the X, Y, or Z field.Specify the magnitude of the velocity in the Magnitude entry box.
◦ Directional components—Specify the components of velocity for each coordinate direction X, Y, or Z. The resultant direction and magnitude of velocity is determined from the values you specify for each coordinate. If you enter a positive value the software applies the velocity in the same direction as the vector. If you use a negative value, the direction of velocity opposes the vector.
5. The default coordinate system of the model is the reference coordinate system and is displayed in the Coordinate system collector. In the case of an assembly, the coordinate system of the top level assembly is the default coordinate system. If the model does not have a default coordinate system then the 
button is not available and the Coordinate system collector is empty. You can select any coordinate system, or create a UCS (user coordinate system).and designate it as the default coordinate system.
button is not available and the Coordinate system collector is empty. You can select any coordinate system, or create a UCS (user coordinate system).and designate it as the default coordinate system.You can also select an alternative reference coordinate system from the Model Tree or Graphics Window.
Click to return to using the default coordinate system of the model.
to return to using the default coordinate system of the model.6. Select units of velocity from the list or accept the default units.
7. Click OK to create and save the boundary condition.