To run a realistic simulation, the pre-treatment(mesh, inputs data) and post treatment (visualisation) can be done using QGIS Long Term Release (LTR) which is the version 3.16.
In a terminal, type :
wget -O - https://qgis.org/downloads/qgis-2019.gpg.key | gpg --import
gpg --fingerprint 51F523511C7028C3
gpg --export --armor 51F523511C7028C3 | sudo apt-key add -
add the line deb http://qgis.org/ubuntu-ltr bionic main
to the file sources.list by typing the command line sudo gedit /etc/apt/sources.list
.
Or using Ubuntu grahic interface, go to "Software & Updates" then "Other software" and click on "Add". Type deb http://qgis.org/ubuntu-ltr bionic main
and validate. The line should
Then in a terminal, type :
sudo apt-get update
sudo apt-get install qgis python3-qgis qgis-plugin-grass
In order to generate videos, install the plugin Crayfish as well.