|
|
| Menu location |
|---|
| Model → Fluid boundary conditions → Initial flow velocity condition |
| Workbenches |
| FEM |
| Default shortcut |
| None |
| Introduced in version |
| - |
| See also |
| Constraint flow velocity, Constraint initial pressure |
| Solvers |
|---|
| Elmer |
Description
Creates an initial flow velocity condition for a fluid flow analysis.
The FEM initial flow velocity task panel
Usage
- There are several ways to invoke the command:
- Press the
Initial flow velocity condition button. - Select the Model → Fluid boundary conditions → Initial flow velocity condition option from the menu.
- Press the
- Enter an initial flow velocity value for the analysis. The value is entered as a combination of the 3 main cartesian vectors components (X,Y,Z).
- For a 3D analysis, select a 'solid' (body) from your model, for a 2D analysis select a face. However, it is also possible to select a face (e.g. the inlet of a pipe) in 3D or an edge in 2D.
Formulas
For a description how to input formulas, see section Formulas in the page for the Flow velocity constraint.
Notes
In simple analyses, it is not necessary to specify the initial flow velocity, however it is recommended as best practice.
This page is retrieved from https://wiki.freecad.org/FEM_ConstraintInitialFlowVelocity