Notus CFD is thoroughly verified and validated thanks to an important amount of numerical test cases and adequate processing tools. They are separated into two main topics, Verification and Validation:

The verification topic provides a set of test cases that aim to verify the base numerical methods. Precise convergence is verified, symmetry is tested. It is mainly a mathematical and numeric oriented approach. They can be used to compare numerical schemes and methods.
The validation topic provides a set of test cases that aim to validate the usability of the code on typical, advanced and well documented physical cases taken from the literature. They can be used to compare results obtained with other CFD codes.

When installing Notus CFD, the first step is to verify and validate that the version compiled on your hardware and sofware produce the expected results - see run notus guide. This script runs a collection of NTS files that cover most of the modeling and numerical methods of the code.

Most NTS files are sufficient to describe a case, but for some test cases, particular work is done in Fortran files compiled after the Notus library compilation. The directory src/notus/test_cases contains these Fortran files. Please refer to the developer's V&V page for more details.