Solver Capabilities:– Two incompressible fluid
– Non isothermal fluid
– Immiscible fluid
– Phase change (evaporation-condensation) between a fluid and its vapor
– VOF (volume of fluid) phase-fraction based interface capturing approach
– Lee phase change model
Computational case:2D flat plate test case from

Vyskocil, L. Schmid, J., Macek J. CFD simulation of air-steam flow with condensation. Nuclear Engineering and Design, 2014.

The case is described in the following figure.

2-dimensional case

Wet steam flows through a flat plate. One side of the wall is being cooled thus condensate will appear on that side.


The 2-dimensional structured mesh is created using base mesh of CFDSOF.

The fluid domain mesh

Fluid Properties

For this simulation, wet-steam of water is used at its saturation temperature of 363.15 \> K and its saturation pressure of 0.7 \> bar . The properties are listed below


  • Kinematic viscosity, \nu = 0.329 \times 10^{-6} \> m^{2}/s
  • Density, \rho = 965.97 \> kg/m^{3}
  • Specific isobar heat capacity, \text{Cp} = 4.204 \> KJ/kg K
  • Specific isochoric heat capacity, \text{Cv} = 3.824 \> KJ/kg K
  • Thermal conductivity, \alpha = 0.6748 \> W/m K


  • Kinematic viscosity, \nu = 28.217 \times 10-6 \> m^{2}/s
  • Density, \rho = 0.42277 \> kg/m^{3}
  • Specific isobar heat capacity, \text{Cp} = 2.041 \> KJ/kg K
  • Specific isochoric heat capacity, \text{Cv} = 1.530 \> KJ/kg K
  • Thermal conductivity, \alpha = 0.0240 \> W/m K
  • Latent heat of vaporization, \text{H} = 2286.79 \> KJ/kg


Temperature, velocity, and vapour mass fraction at several points is being monitored.

Temperature distribution near wall

Velocity distribution along y axis
Vapor mass fraction distribution near wall

The animation of the condensation

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