13th October 2016

Download v4.1 | Ubuntu

Ubuntu Versions

OpenFOAM 4.1 is a version bug fix release of OpenFOAM provided by the openfoam4 pack. It is accompanied by ParaView 5.0.1, compiled with the official OpenFOAM reader module, provided by the paraviewopenfoam50 pack. Both packs are available for the following versions of Ubuntu:

14.04 LTS, codename trusty (32bit and 64bit)
16.04 LTS, codename xenial (64bit only)
16.10, codename yakkety (64bit only, added 4 Nov 2016)
17.04, codename zesty (64bit only, added 16 Apr 2017)

Note: The pack for 16.04 includes foamyHexMesh, which uses CGAL v4.7; the pack for 14.04 does not include foamyHexMesh because the packaged version of CGAL (v4.2) is no longer supported.

Upgrading from OpenFOAM-4.0

Existing users of openfoam4 can upgrade by entering the following in a terminal:

sudo apt-get update
sudo apt-get install --only-upgrade openfoam4

Alternatively openfoam4 will be installed as part of an automatic upgrade of the entire system, which can also be invoked by the following commands.

sudo apt-get update
sudo apt-get upgrade

Users can also specifically

Installation

OpenFOAM and ParaView can be simply installed for the first time using the apt package management tool. The user will need to provide superuser password authentication when executing the following commands with sudo

Copy and paste the following in a terminal prompt (Applications → Accessories → Terminal) to add dl.openfoam.org to the list of software repositories for apt to search, and to add the public key (gpg.key) for the repository to enable package signatures to be verified.
```
sudo add-apt-repository http://dl.openfoam.org/ubuntu
sudo sh -c "wget -O - http://dl.openfoam.org/gpg.key | apt-key add -"
```
**Note: This only needs to be done once for a given system
Update the apt package list to account for the new download repository location
```
sudo apt-get update
```
Install OpenFOAM (4 in the name refers to version 4.1) which also installs paraviewopenfoam50 as a dependency.
```
sudo apt-get -y install openfoam4
```

OpenFOAM 4.1 and ParaView 5.0.1 are now installed in the /opt directory. The following video works for all OpenFOAM 4 versions.

Installation Problems

1. Networking must be enabled in order to be able to install software packages in Ubuntu. Installation failure due to networking problems usually results in an error message that reports failures in fetching archives and ends with a line like the following:

E: Unable to fetch some archives...

2. A few users have encountered an error message similar to the following during installation (step 3)

Some packages could not be installed. This may mean that you
have requested an impossible situation...

The following information may help to resolve the situation:

The following packages have unmet dependencies: openfoam4 :
Depends: csh but it is not installable
Depends: libopenmpi1.3 but it is not installable...

The most likely cause of this error message is that the universe repositories are not enabled. To enable them, type the following in a terminal window:

sudo apt-add-repository universe
sudo apt-get update

3. If MPICH is installed on the system, then during user configuration (below), the following error message might occur when sourcing the etc/bashrc file in the OpenFOAM installation:

gcc: error: unrecognized command line option '--showme:link'

The user can check whether MPICH is installed by typing the following:

sudo update-alternatives --list mpi

which returns /usr/mpich/include if MPICH is installed. This error is caused when the default mpicc is MPICH, rather than OpenMPI. The simplest way to fix the problem is to set mpicc to OpenMPI is by running the following command in a terminal prompt:

sudo update-alternatives --set mpi /usr/lib/openmpi/include

The .deb files for different versions of Ubuntu supplied can be downloaded directly from the OpenFOAM Download Repository.

User Configuration

In order to use the installed OpenFOAM package, complete the following

Open the .bashrc file in the user’s home directory in an editor, e.g. by typing in a terminal window (note the dot)
```
gedit ~/.bashrc
```
At the bottom of that file, add the following line (see Note 1 below) and save the file
```
source /opt/openfoam4/etc/bashrc
```
Open a new terminal window (see Note 2 below) and test that the simpleFoam application, from the OpenFOAM package, is working by typing
```
simpleFoam -help
```
A “Usage” message should appear. Your installation and user configuration is complete.

Note 1: If a similar line has already been added to the user’s .bashrc file, e.g. for a previous version of OpenFOAM, then the line should be deleted or, alternatively, commented out by inserting a # at the beginning of the line.
Note 2: If a user wishes to execute simpleFoam in the same terminal window, they must first register the change to the .bashrc file by typing at the terminal prompt (note the dots): source $HOME/.bashrc

Getting Started

Create a project directory within the $HOME/OpenFOAM directory named <USER>-4.1 (e.g. chris-4.1 for user chris and OpenFOAM version 4.1) and create a directory named run within it, e.g. by typing:

mkdir -p $FOAM_RUN

Copy across the backward facing step example, generate the mesh with blockMesh and run the steady flow, incompressible solver simpleFoam

cd $FOAM_RUN
cp -r $FOAM_TUTORIALS/incompressible/simpleFoam/pitzDaily .
cd pitzDaily
blockMesh
simpleFoam
paraFoam

Refer to the OpenFOAM User Guide to get started.

Reporting Bugs in OpenFOAM

We appreciate that bugs in OpenFOAM are reported so we can fix them. Please refer to the OpenFOAM bugs pages to report bugs.