The Rotating Machinery, Laminar Two-Phase Flow, Phase Field Interface
The Rotating Machinery, Laminar Flow, Phase Field multiphysics interface () found under the Multiphase Flow > Rotating Machinery, Two-Phase Flow, Phase Field branch (), is a multiphysics interface designed to track the interface between two immiscible fluids in equipment containing one or more rotating parts. The flow is assumed to be laminar, that is, to be of low to moderate Reynolds number.
This physics interface combines the capabilities of the Rotating Machinery, Laminar Flow interface and the Phase Field in Fluids interface. It is available in 2D and 3D.
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. A Moving Mesh interface with a Rotating Domain node is added automatically in the Model Builder under the Definitions node. In addition, a multiphysics coupling feature, The Two-Phase Flow, Phase Field Coupling Feature, is added automatically under the Multiphysics node.
Simulations using the Laminar Two-Phase Flow, Phase Field interface are always time-dependent since the position of an interface is almost always dependent of its history.
Interface Properties
Discretization
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.
In the CFD Module User’s Guide: