The Laminar Two-Phase Flow, Phase Field interface (
) found under the
Multiphase Flow>Two-Phase Flow, Phase Field branch (
), is a multiphysics interface designed to track the interface between two immiscible fluids. The flow is assumed to be laminar, that is, to be of low to moderate Reynolds number. The fluids can be incompressible or compressible.
When adding the Laminar Two-Phase Flow, Phase Field multiphysics interface, a
Laminar Flow and a
Phase Field in Fluids interface are added to the Model Builder. In addition, a multiphysics coupling feature,
The Two-Phase Flow, Phase Field Coupling Feature, is added automatically under the
Multiphysics node. Note that unlike the Two-Phase Flow, Level Set interfaces, the wetted wall feature here is not implemented as a separate multiphase coupling boundary feature but as a default
Wetted Wall feature in the
Phase Field in Fluids interface.
By default the Turbulence model type selected is
None. Turbulent flow can be simulated by changing the
Turbulence model type to
RANS.
By default the fluid flow discretization is set to P1+P1, and the phase field discretization is set to
Linear. This combination provides improved conservation of the integral of the phase field variable when using the nonconservative form of the phase field equations.
