The FEST-3D solver is available at GitHub to download. The tutorials are provided in a separate GitHub repository and the same is used as a submodule in the main source code with folder name [RootFolder]/run. The grid files for the tutorials are provided in the respective test case folders.
In case you do not have Git installed on you local machine, you can do so by using following command on ubuntu:
sudo apt-get install git
A similar command can be used for other Linux package platforms.
git clone https://github.com/FEST3D/FEST-3D.git
The tutorials are submodule to main FEST-3D source code on GitHub.
git clone --recursive https://github.com/FEST3D/FEST-3D.git
git submodule update --init
If you are downloading the FEST-3D package as a zip file from GitHub or Home page on Linux system, use the command "unzip", which can be installed (if not available) using the command:
sudo apt-get install unzip
and then use the following command to unzip the folder
unzip FEST-3D-master.zip -d FEST3D
The run folder is not part of the main zip folder.