Cyclone with combustion
 

Hello!

I'm doing a project analyzing a cyklone with heated walls that will combust and seperate wood particles. The Problem im facing is that the seperation combined with combustion makes unreasonble results. Just doing the particle seperation works fine and doing a pre-defined combustion in a simple circular duct also work fine. The particles ends up going straight down and the fraction of gas species do not conquer with theoretical results. The pressure outlets also give backflows even if the geomtry or URF are changed.

Would be of much help if someone have struggled with this before and get some useful tips. There's nothing on the internet...