The objective of the internship is both to develop the coupling of the hydrodynamic numerical scheme with several physical models and to study the possibilities of modifying certain calculation steps in order to obtain a more robust code. The course will be carried out in three main stages: a first bibliographic part in order to familiarize yourself with the subject and applications of the course, a theoretical part during which several developments and modifications of the numerical scheme will be studied, a computer development part in order to implement these developments in a calculation code and to compare the results on several representative test cases, and an editorial part in order to record the developments carried out and the results obtained in an internship report. The developments will be coded in a 1D C++ model and an extension to 2D is planned if time permits. In accordance with the commitments made by the CEA in favor of the integration of people with disabilities, this job is open to all and all. Participating in national protection, an administrative investigation is carried out for all CEA employees in order to ensure the integrity and security of the nation.