For outflow, it is generally possible to specify the velocity, but it is more common to either set all gradients to zero or define the pressure. Since pressure in the Navier-Stokes equations only appears as a derivative, its absolute value is irrelevant for incompressible flows. Therefore, it is sufficient to set the pressure at a single point within the flow domain. The outflow boundary should be placed far enough away to ensure an almost undisturbed flow.
H. Examples
- H1.1. 2D Square Plane
- H1.2. Bridge Section
- H.1.3. Cube Example
- H1.4. Atmospheric Boundary Layer Test
- H 1.6. Measured Data for Wind Loads on Small Buildings (WTG Example 9.3)
- H.1.7. Measurement Data for Multiple Structures (WTG Example 9.4)
- H.1.8. Measurement Data for Wind Loads on Cylindrical Structures (WTG Example 9.5)
D6.3.2. Outflow
Parent Chapter