> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ntop.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Velocity

<CardGroup cols={2}>
  <Card title="Boundary, Vector Field, 5.23.0" href="#boundary-vector-field-5230" />

  <Card title="Cad faces, Vector Field, 5.23.0" href="#cad-faces-vector-field-5230" />
</CardGroup>

***

<h2 id="boundary-vector-field-5230">
  Boundary, Vector Field, 5.23.0
</h2>

A Boundary Condition that specifies a fluid's velocity entering or leaving a domain.

### Inputs

| Name     | Type                                                               | Description                             |
| -------- | ------------------------------------------------------------------ | --------------------------------------- |
| Boundary | [Boundary](../../../../block-documentation/types/boundary)         | The Boundary selected for the velocity. |
| Velocity | [Vector Field](../../../../block-documentation/types/vector-field) | The Velocity vector.                    |

### Outputs

| Type                                                       |
| ---------------------------------------------------------- |
| [Velocity](../../../../block-documentation/types/velocity) |

***

<h2 id="cad-faces-vector-field-5230">
  Cad faces, Vector Field, 5.23.0
</h2>

A Boundary Condition that specifies a fluid's velocity entering or leaving a domain.

### Inputs

| Name      | Type                                                               | Description                                             |
| --------- | ------------------------------------------------------------------ | ------------------------------------------------------- |
| Cad faces | [CAD Face List](../../../../block-documentation/types/cad-face)    | The CAD faces to apply the velocity boundary condition. |
| Velocity  | [Vector Field](../../../../block-documentation/types/vector-field) | The Velocity vector.                                    |

### Outputs

| Type                                                       |
| ---------------------------------------------------------- |
| [Velocity](../../../../block-documentation/types/velocity) |