> ## 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.

# Surface Heat Flux

<CardGroup cols={2}>
  <Card title="Boundary, Scalar Field" href="#boundary-scalar-field" />

  <Card title="Cad faces, Scalar Field" href="#cad-faces-scalar-field" />
</CardGroup>

***

<h2 id="boundary-scalar-field">
  Boundary, Scalar Field
</h2>

Applies a distributed heat flux normal to selected boundary face entities.

### Inputs

| Name      | Type                                                               | Description                                |
| --------- | ------------------------------------------------------------------ | ------------------------------------------ |
| Boundary  | [Boundary](../../../../block-documentation/types/boundary)         | The boundary faces to apply the heat flux. |
| Magnitude | [Scalar Field](../../../../block-documentation/types/scalar-field) | The distributed heat flux.                 |

### Outputs

| Type                                                         |
| ------------------------------------------------------------ |
| [Heat Flux](../../../../block-documentation/types/heat-flux) |

***

<h2 id="cad-faces-scalar-field">
  Cad faces, Scalar Field
</h2>

Applies a distributed heat flux normal to the selected CAD faces.

### Inputs

| Name      | Type                                                               | Description                |
| --------- | ------------------------------------------------------------------ | -------------------------- |
| Cad faces | [CAD Face List](../../../../block-documentation/types/cad-face)    | The CAD faces.             |
| Magnitude | [Scalar Field](../../../../block-documentation/types/scalar-field) | The distributed heat flux. |

### Outputs

| Type                                                         |
| ------------------------------------------------------------ |
| [Heat Flux](../../../../block-documentation/types/heat-flux) |