gerris software package provides Gerris Flow Solver, you can install in your Ubuntu 12.04 LTS (Precise Pangolin) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install gerris
gerris is installed in your system.
Make ensure the gerris package were installed using the commands given below,
$ sudo dpkg-query -l | grep gerris *
You will get with gerris package name, version, architecture and description in a table
| Distro | Ubuntu 12 04 lts precise pangolin |
| Section | Mathematics |
| Package | gerris |
| Version | 20110329-dfsg.2-1build1 |
| Description | Gerris Flow Solver |
| Sub Section | Math |