This lesson covers the process of setting up the Solver in Ansys Fluent® fluid simulation software, it explains how to define governing equations, add boundary conditions, and specify material properties. The lesson also discusses the importance of selecting the right precision and solver processes to match the number of CPU cores for effective parallelization. The lesson provides a step-by-step guide on how to perform a mesh check, refine governing equations, and alter the mathematical model. The lesson also shows how to change the model to laminar, specify the density and viscosity of the flow fluid, and define the boundary conditions to simulate a desired flow.