---
name: "ff3d"
section: "1"
platform: "linux"
package: "freefem3d"
version: "1.0pre10-3.4"
release: "Debian 9 (Stretch)"
platforms: ["linux"]
url: "https://new.carta.tech/ff3d"
---

# ff3d(1)

FreeFEM3D is a general PDE solver

## NAME

ff3d - FreeFEM3D is a general PDE solver

## SYNOPSIS

**ff3d** \[**-v**\|**-h**\|**-H**\]\
 **ff3d** \[-nw**\]\[**-V *verbosity\_level***\]**\[filename\]

## DESCRIPTION

This manual page documents, briefly, the **ff3d** command.

FreeFEM3D (aka **ff3d**) is a 3D solver of partial differential equations (PDE).  It is a member of the familly of the freefem programs (see **http://www.freefem.org**).

ff3d, as well as its cousins, is a PDE solver driven by a user-friendly language. It solves many kind of problems such as elasticity, fluids (Stokes and Navier-Stokes) and a lot more. The user has to enter the equation associated with the problem, giving either the PDE in strong formulation or weak (variational) formulation.

ff3d can use either the Finite Elements method (the mesh of the geometry being provided by the user) or a Fictitious Domain like approach where the geometry is described using Constructive Solid Geometry (CSG). This description is done using the POV-Ray language but others such as VRML could be added.

The processing of the results is left to the user.  One can use various graphic tools: output in the MEdit mesh format or VTK are supported. The implementation of a VTK base visualization module is underway.

The goal of ff3d is to provide a good teaching tool and a research toolbox (the code is written in C++ and its design is such that new methods can be easily implemented).

## OPTIONS

- **-v**, **--version**

  Output version of program and exit.  The default mode is \`v', a simple version.  The \`c' mode will print copyright information and \`n' will print the full copyright notice.

- **-h**, **--help**

  Display usage information and exit.

- **-H**, **--more-help**

  Display extended usage information and Licence and exit.

- **-V** *verbosity\_level*, **--verbosity** *verbosity\_level*

  Set level of verbosity. The default *number* for this option is:\
    3

  Changes ff3d level of verbosity. Bigger values will make ff3d give more and more informations.

## AUTHORS

Jean-Baptiste Apoung Kamga\
 Stephane Del Pino\
 Olivier Pironneau\
 Driss Yakoubi\

## CONTRIBUTORS

Cecile Dobrzynski\
 Pascal Have\
 Christophe Prud'homme\

## REPORTING BUGS

Please send bug reports to:  \
 	**ff3d-dev@nongnu.org** or FB freefem@ann.jussieu.frFP\
 or better use the  **Bug Tracking System**:\
 	**http://savannah.nongnu.org/bugs/?group=ff3d**

## COPYRIGHT

**This program is free software; you can redistribute it and/or modify** **it under the terms of the GNU General Public License as published by** **the Free Software Foundation; either version 2, or (at your option)** **any later version.**\
 **see http://www.gnu.org/licenses/gpl.html for details.**