---
name: "freefoam-combinePatchFaces"
section: "1"
platform: "linux"
package: "freefoam"
version: "0.1.0+dfsg+1-3"
release: "Debian 8 (Jessie)"
platforms: ["linux"]
url: "https://new.carta.tech/freefoam-combinePatchFaces"
---

# freefoam-combinePatchFaces(1)

Checks for multiple patch faces on same cell and combines them.

## NAME

freefoam-combinePatchFaces - Checks for multiple patch faces on same cell and combines them.

## SYNOPSIS

**freefoam combinePatchFaces** *\<feature angle \[0..180\]\>* \[-concaveAngle *\<angle \[0..180\]\>*\] \[-help\] \[-srcDoc\] \[-doc\] \[-overwrite\] \[-parallel\] \[-case *\<dir\>*\] \[-snapMesh\]

## DESCRIPTION

These result from e.g. refined neighbouring cells getting removed, leaving 4 exposed faces with same owner.

Rules for merging: - only boundary faces (since multiple internal faces between two cells not allowed anyway) - faces have to have same owner - faces have to be connected via edge which are not features (so angle between them \< feature angle) - outside of faces has to be single loop - outside of face should not be (or just slightly) concave (so angle between consecutive edges \< concaveangle

E.g. to allow all faces on same patch to be merged:

combinePatchFaces .. cavity 180 -concaveAngle 90

## OPTIONS

*\<feature angle \[0..180\]\>*

**TODO** Detailed description of argument.

- **-snapMesh**

  Remove loose points on edges.

**-concaveAngle** *\<angle \[0..180\]\>*

Maximum allowed concave angle.

- **-overwrite**

  Overwrite existing data.

- **-case** *\<dir\>*

  Case directory.

- **-parallel**

  Run in parallel.

- **-help**

  Display help message.

- **-doc**

  Display Doxygen API documentation page for this application.

- **-srcDoc**

  Display Doxygen source documentation page for this application.

## SEE ALSO

An overview of FreeFOAM is given in [**freefoam**(1)](/freefoam/1.md).

## AUTHOR

OpenCFD Ltd.

## FREEFOAM

Part of the [**freefoam**(1)](/freefoam/1.md) suite.

## COPYRIGHT

• Copyright © 2008-2012 Michael Wild.

• Copyright © 1991-2010 OpenCFD Ltd.