Multi-disciplinary system simulation is a type of simulation that involves multiple engineering disciplines, such as aerodynamics, fluid dynamics, heat transfer, and structural mechanics. This type of simulation is used to study and analyze the behavior of complex systems, often in an effort to optimize the performance of a design or process. It typically combines different physics-based models in order to simulate and predict the behavior of components and systems in a range of different conditions. The results of the simulations can be used to inform decisions about design and processes, making it an invaluable tool for engineering teams.