# FEM ConstraintInitialFlowVelocity

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Model → Fluid constraints → Constraint initial flow velocity |

Workbenches |

FEM |

Default shortcut |

Introduced in version |

- |

See also |

FEM tutorial |

## Contents |

## Description

Creates an initial flow velocity constraint for a fluid flow analysis.

## Usage

- Click on or choose
**Model → Fluid Constraints → Constraint initial flow velocity**from the top menu. - 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).

## Limitations

- The constraint applies the initial flow velocity to all nodes in the FEA model.
- The constraint cannot be oriented other then using the main cartesian components.

## Notes

In the most simple analyses, it is not necessary to specify the initial flow velocity, however it is recommended as best practice.

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