twoPhaseEulerFoam – Diameter Model (v1812)

constant

Constant dispersed-phase particle diameter model.

isothermal

Isothermal dispersed-phase particle diameter model.
\begin{align}
p \times \frac{4}{3} \pi \left( \frac{d}{2} \right)^3 &= p_0 \times \frac{4}{3} \pi \left( \frac{d_0}{2} \right)^3 \\
d &= d_0 \left( \frac{p_0}{p} \right)^{1/3} \tag{1} \label{eq:levmdiffusion}
\end{align}

IATE

IATE (Interfacial Area Transport Equation) bubble diameter model.
Solves for the interfacial curvature per unit volume of the phase rather than interfacial area per unit volume to avoid stability issues relating to the consistency requirements between the phase fraction and interfacial area per unit volume.

The following bubble interaction mechanisms are considered in this model.

    • wakeEntrainmentCoalescence
      Bubble coalescence by wake entrainment
    • randomCoalescence
      Bubble coalescence by random collision
    • turbulentBreakUp
      Bubble break-up due to the impact of turbulent eddies
      \begin{align}
      \phi_{TI} = \frac{C_{ti}}{3} \frac{U_t}{d} \sqrt{1 – \frac{We_{Cr}}{We}} e^{-\frac{We_{Cr}}{We}}
      \end{align}

      • \(We\): Weber number [-]
      • \(U_t\): Turbulent fluctuation velocity [m/s]

    Author: fumiya

    CFD engineer in Japan

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