UDF of Multiphase
 

Dear eveyone,

I'm working in numerical simulation of snowdrift.Now I have difficulties in my UDF.

With mixture model ,from the continuity equation for secondary phase p, the volume fraction equation for secondary phase p can be obtained with FLUENT.

My control equation of snow phase is different with it.I want to add a term to the right side of the original control equation,that is △[μ△(αρ)].Here △ is the Hamiltonian operator,μ=A×κ×κ／ε,A is a constant ,κ is the turbulent kinetic energy and ε is turbulent dissipation rate.α is volume fraction of snow,ρ is the density of snow,which is a constant.

Besides,I want to define mpq=0,mqp=0,which is the second term of the original equations.

I need help to change the original control equation with UDF.Thanks in advance.I am always looking forward to your help.

heliyongkb