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Multiphase Flows

Multiphase Flows

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  3. I am using the Non-Equilibrium Steam model in CFX. This model has an adjustment parameter called the Condensation Rate Underrelaxation Factor with a default value of 0.2. What does this parameter do? Will it have any effect on the solution?

I am using the Non-Equilibrium Steam model in CFX. This model has an adjustment parameter called the Condensation Rate Underrelaxation Factor with a default value of 0.2. What does this parameter do? Will it have any effect on the solution?

Tagged: 19.1, cfx, fluid-dynamics, MP - Eulerian MP Flow, NES model, phase-change
    • April 5, 2023 at 2:32 pm
      FAQFAQ
      Participant

      The Condensation Rate Relaxation Factor is an under-relaxation factor applied to the update of the interfacial area concentration for the droplet-continuum phase pair. As with most relaxation factors, it should have no effect on the results over the long term. It is applied to the Interfacial Area Concentration as: IAC_n+1 = URF*IAC_computed_n+1 + (1-URF)*IAC_n where URF represents the Condensation Rate Relaxation Factor

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