Explore a comprehensive CFD Fluent simulation tutorial focusing on the analysis of two concentric rotating cylinders moving in opposite directions. Begin by familiarizing yourself with the problem's geometry, boundary conditions, and key variables. Learn basic sketching techniques in SpaceClaim, discover various methods for optimizing mesh quality, and master the art of mesh quality assessment. Dive into Fluent to initialize the simulation and set up boundary conditions. Proceed to CFD-post for result visualization and validation, including the creation of streamline plots, contour plots, and velocity distribution charts across the annulus. Follow along as the tutorial progresses through workbench setup, geometry creation in SpaceClaim, detailed mesh configuration, Fluent simulation setup, calculation execution, and in-depth post-processing using CFD Post.