> ## 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.

# Merge FE Meshes

## About this Block

**What it does:** Combines adjacent nodes of multiple FE Meshes to generate a single FE Mesh. Nodes from the different meshes, within a distance tolerance, collapse into a single node.

**Commons uses:**

* Export one mesh object that may have disconnected pieces.
* Merging a list of meshes for downstream use.

**Tips:**

* The merged node will take the location from the first FE Mesh in the list.
  * For example, if two meshes are in a list, merged nodes will take the location of the first mesh in the list, and if you add a third mesh, the merged nodes of that mesh will be merged into the nodes in the mesh from the first merging process.
* Nodes are merged, but faces and edges are preserved.
* If the merged meshes have matching meshes on the interface, the inner multiple boundaries are removed.

## Example File

Download Example: [Merge FE Mesh](https://storage.googleapis.com/files-learn/static/ExtendedBlockDocs/merge_fe_mesh.ntop)

![Merge FE Mesh](https://storage.googleapis.com/files-learn/static/ExtendedBlockDocs/mergefemesh.png)

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Combine FE Meshes to generate one single mesh by collapsing nodes that are within a given tolerance.

### Inputs

| Name               | Type                                                          | Description                                                                      |
| ------------------ | ------------------------------------------------------------- | -------------------------------------------------------------------------------- |
| Meshes             | [FE Mesh List](../../../../block-documentation/types/fe-mesh) | The meshes to merge.                                                             |
| Distance threshold | [Scalar](../../../../block-documentation/types/scalar)        | Vertices within this distance threshold will be merged together into one vertex. |

### Outputs

| Type                                                     |
| -------------------------------------------------------- |
| [FE Mesh](../../../../block-documentation/types/fe-mesh) |