Apply new Equation as UDS in UDF -- CFD Online Discussion Forums

March 21, 2023, 12:50

Apply new Equation as UDS in UDF

hesamb

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Hesam

Join Date: Jan 2023

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Hi everyone,

I want to apply an equation as follows:
∂/∂x (n_i φ_i u)+∂/∂y (n_i φ_i v)-∂/∂x (λ_i (∂φ_i)/∂x)-∂/∂y (λ_i (∂φ_i)/∂y)=S_φi

Here n_i is atom density which is different from density. I want to solve this equation beside momentum, continuity, and energy equation.

Unfortunately, Fluent considers ρ instead of n_i.
How can I solve this problems?

Thanks,
Hesam

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