> ## 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.

# Radiation Boundary Load

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

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

***

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

Applies a radiation load to selected boundary face entities for the given Ambient temp, Emissivity, and Stefan-Boltzmann constant of 5.670374419e-8 W\.m^-2.K^-4

### Inputs

| Name | Type | Description |
| - | - | - |
| Boundary | [Boundary](../../../../block-documentation/types/boundary) | The boundary faces to apply the load. |
| Ambient temp | [Temperature Field](../../../../block-documentation/types/temperature-field) | The temperature of the medium surrounding the boundary. |
| Emissivity | [Scalar Field](../../../../block-documentation/types/scalar-field) | Non-dimensional measure of the ability of the Boundary to emit radiation energy. |

### Outputs

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

***

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

Applies a radiation load to the selected CAD faces for the given Ambient temp, Emissivity, and Stefan-Boltzmann constant of 5.670374419e-8 W\.m^-2.K^-4

### Inputs

| Name | Type | Description |
| - | - | - |
| Cad faces | [CAD Face List](../../../../block-documentation/types/cad-face) | The CAD faces. |
| Ambient temp | [Temperature Field](../../../../block-documentation/types/temperature-field) | The temperature of the medium surrounding the boundary. |
| Emissivity | [Scalar Field](../../../../block-documentation/types/scalar-field) | Non-dimensional measure of the ability of the object to emit radiation energy. |

### Outputs

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


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