Learning Forum

[yclc.liu]

Hi all,

I’m using 2024 R2 Fluent (Species Transport + DPM / Lagrangian Wall Film) to model heterogeneous reactions involving gas/liquid/solid species. Right now my model works when I use the pair of materials: Mixture material (in Species Transport) + Particle mixture (in DPM/LWF), which allows me to enable Multicomponent Particle Reactions.

However, based on my needs, some reactions should be Wall Surface Reactions instead of particle reactions. The problem is: as soon as I switch any one reaction to a wall surface/wall film reaction, the model no longer converges and quickly crashes.

My question: What is the correct way (or required settings/workflow) to enable Wall Surface Reactions and Multicomponent Particle Reactions at the same time in Fluent?
Are there any known limitations or recommended approaches for coupling these two reaction types?

Thanks!

[Ren]

These two types of reactions are independent from each other and can be used together. For wall surface reactions, you need to include the desired "surface" species in the gas mixture material, define wall surface reactions and also provide the required input for the Mechanism definition in the mixture material.

 

[Ren]

You also need to check and define boundary conditions for the wall boundaries that involve wall surface reactions.