> ## 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.

# Simulation Model

<CardGroup cols={2}>
  <Card title="Domains, Connectors" href="#domains-connectors" />

  <Card title="Domains, Connectors, 5.23.0" href="#domains-connectors-5230" />
</CardGroup>

***

## About this Block

**What it does:** The **Simulation Model** block uses Domains based on the overload either **Virtual Domain** or **FE Domain** and Connectors to assign attributes to the domains to prepare them for analysis.

**Common uses:**

* Preparing your part for analysis (used in every analysis workflow).
* Exported for analysis in other programs.

**Tips:**

* Each **Solid Domain** with Mesh overload needs one FE Mesh and at least one Material Attribute.
* Each **Virtual Domain** and **Solid Domain** with Implicit Body overload needs one Implicit Body and at least one Material Attribute.
* A **Simulation Model** does not need a connector to run if it only has one domain in it.
* A Domain block can auto convert (called autocast) to a **Simulation Model** when it is used in an input that requires an **Simulation Model**. This is useful for single domain setups.

## Example File

Download Example: [FE Model](https://storage.googleapis.com/files-learn/static/ExtendedBlockDocs/FEModel.ntop)
![FE Model](https://storage.googleapis.com/files-learn/static/ExtendedBlockDocs/FEModel.png)

***

<h2 id="domains-connectors">
  Domains, Connectors
</h2>

Combines a list of FE Domains and corresponding Connectors into an FE Model. The block performs checks to determine whether all domains are connected/restrained properly.

### Inputs

| Name       | Type                                                              | Description                                   |
| ---------- | ----------------------------------------------------------------- | --------------------------------------------- |
| Domains    | [FE Domain List](../../../../block-documentation/types/fe-domain) | The domains in the model.                     |
| Connectors | [Connector List](../../../../block-documentation/types/connector) | The connectors and interactions in the model. |

### Outputs

| Type                                                       |
| ---------------------------------------------------------- |
| [FE Model](../../../../block-documentation/types/fe-model) |

***

<h2 id="domains-connectors-5230">
  Domains, Connectors, 5.23.0
</h2>

Combines a list of Virtual Domains and corresponding Connectors into a Virtual Model.

### Inputs

| Name       | Type                                                                        | Description                                   |
| ---------- | --------------------------------------------------------------------------- | --------------------------------------------- |
| Domains    | [Virtual Domain List](../../../../block-documentation/types/virtual-domain) | The domains in the model.                     |
| Connectors | [Connector List](../../../../block-documentation/types/connector)           | The connectors and interactions in the model. |

### Outputs

| Type                                                                 |
| -------------------------------------------------------------------- |
| [Virtual Model](../../../../block-documentation/types/virtual-model) |