[cfdbusiness]

I am researching on the topic of 3 phase flow simulation in FCC column with vaporization and reactions. I simulated the system using Eulerian-Eulerian
approach. Consider primary phase as Feed/Product Gas while Catalyst and Feed Droplet as secondary phase. I consider Catalyst and Feed Droplet as particle phase; thus, granular temperature equation is applied to those two
phases. However, the current results from standard Fluent simulation DO NOT represent the possible actual flow occurred in the FCC column. I believed that the problem is the interaction term between particle to particle in granular temperature differential equation (Fluent6.3 User Guide equation 23.5-75) may cause the problem. The problem may arise from the fact that the interaction coefficient (drag coefficient) between particle to particle for Momentum and Granular temperature are the same.
Note that feed droplet will vaporize into the gas and react with catalyst
I would like to decouple the interaction coefficient (drag coefficient) between particle to particle for Momentum and Granular temperature. I would like to eliminate the interaction term between particle to particle on both catalyst and feed droplet, but keep the interaction term between gas and particle (both catalyst and feed droplet) in Granular temperature differential equation.

Fluent. I would like to know if there are any Text command that will only eliminate the interaction between particle to particle, but still keep particle to gas interaction?

Thank you in advance.

Sorry for a lengthy explanation

SK