> ## 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.

# Volume Fraction Constraint

<CardGroup cols={2}>
  <Card title="Scalar" href="#scalar" />

  <Card title="Scalar, 1.1.0" href="#scalar-110" />
</CardGroup>

***

<h2 id="scalar">
  Scalar
</h2>

Define a volume fraction constraint for topology optimization.

### Inputs

| Name  | Type                                                   | Description                                                                                                             |
| ----- | ------------------------------------------------------ | ----------------------------------------------------------------------------------------------------------------------- |
| Value | [Scalar](../../../../block-documentation/types/scalar) | The required volume fraction between 0 and 1. The resulting volume fraction should be less than or equal to this value. |

### Outputs

| Type                                                                         |
| ---------------------------------------------------------------------------- |
| [Design Constraint](../../../../block-documentation/types/design-constraint) |

***

<h2 id="scalar-110">
  Scalar, 1.1.0
</h2>

Define a volume fraction constraint for topology optimization.

### Inputs

| Name  | Type                                                   | Description                                                                                                             |
| ----- | ------------------------------------------------------ | ----------------------------------------------------------------------------------------------------------------------- |
| Value | [Scalar](../../../../block-documentation/types/scalar) | The required volume fraction between 0 and 1. The resulting volume fraction should be less than or equal to this value. |

### Outputs

| Type                                                                         |
| ---------------------------------------------------------------------------- |
| [Design Constraint](../../../../block-documentation/types/design-constraint) |