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Although the steady-state approach is the cheaper and often preferred way to do computational fluid dynamics (CFD) analysis, there are many applications in which you must model the unsteady flow behavior. Performing a transient calculation is like performing a steady-state calculation with some additional considerations. In this two-lesson course, we will start by discussing the additional settings required for performing a transient simulation in Ansys Fluent. Next, using the example CFD problem of air flowing around a square cylinder, we will demonstrate how to set up Fluent for a transient run and learn how to post-process the transient results.