Numerical Resolution of Two-Fluid Model Equations for Condensation and Evaporation Flow in Ducts Using a Pressure Based Method

نویسندگان

  • Sergio Morales
  • Joaquim Rigola
  • Carlos D. Perez-Segarra
  • Assensi Oliva
  • Sergio MORALES
  • Joaquim RIGOLA
  • Carlos D. PÉREZ-SEGARRA
  • Assensi OLIVA
چکیده

A numerical study based on two-fluid model describes the thermal and fluid-dynamic behaviour of the two-phase flow inside ducts -condensers and evaporators-. The discretization of the governing equations has been developed by means of the finite volume technique using a staggered mesh. A semi-implicit pressure based method SIMPLE-like is used to solve the pressure distribution, the velocity field, and the temperature distribution of the each phase. Different empirical correlations have been used to evaluate the mass, momentum and energy exchanged through the interface, geometric conditions, gas and liquid distribution into the tube and other terms that appear in the conservation equations. These correlations are known depending on the flow pattern map, which is function of the gas volume fraction and velocities. A comparison between the numerical simulation data obtained with quasi-homogeneous model and two-fluid model in contrast with experimental data are illustrated.

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تاریخ انتشار 2014