Note: Around the 25-second mark of the video below, an additional step needs to be taken if you are using Ansys software versions 2020 R1 or newer (includes Apps on Demand). In these newer software versions, the default Viscous Model in Fluent (the Model Setup step) is SST K-Omega and should instead be Laminar. To make the change, simply double click on Viscous under Models and change it to Laminar.
Watch the following video for how to set up the physics in Fluent:
Simply click Calculate as shown in the image below and wait for the computer to finish doing all the hard work.