This is a post just following various engineer's ANSYS guide video and sharing my insight about the cases.[ Reference & Specification ]https://www.youtube.com/watch?v=wpb3GEeNT7M Make a Box(Pack) & 24 Cylinders(Cells)HOW1.make 'Fluid Flow(Fluent)' tool box2.click 'Geometry-DesignModeler'3.set the coordinates system and create 'Box' and 'Cylinders' by using 'Create-Primitives' and typing specific..