[jeph91]

Hello, im a beginner with fluent and other CFD softwares, I need to do CFD analysis of a packed bed reactor using Fluent but i have certain doubts regarding the geometry...the reactor is filled with a material in a compact manner so i decided to go with spheres packed together (hexagonally) in a cylinder but the actual particle size is very small and for that the geometry will be too complex in the sense spheres are too small to fit in a cylinder compactly and im not getting in what geometry they should be modeled.

So i want to know that if for a successful CFD analysis we need to go with the exact size of the particles. Please help.