This lesson covers the process of using Ansys Fluent® fluid simulation software to solve algebraic equations iteratively to determine the primary unknowns at the cell centers. The lesson explains how to reduce the linearization error by lowering the criteria for convergence and setting initial guest values for the primary unknowns in each cell. It also guides on how to start the iterative process, set the number of iterations, and interpret the residual plot to ensure the solution has converged to a reasonable level.