Virtual Mass Coefficient Model Reference

The Virtual Mass Coefficient model defines the virtual mass coefficient that appears in Eqn. (1996) for the Virtual Mass Force, relevant for accelerating dispersed flows. The same coefficient also influences the interaction of particles with turbulence, even when the mean flow is not accelerating.

The Virtual Mass Coefficient model is required for the following models:

The Virtual Mass Coefficient model is selected automatically when any of these models is selected, except for the Tchen Turbulence Response since that is a phase model.

Table 1. Virtual Mass Coefficient Model Reference
Theory	See Virtual Mass.
Provided By	[phase interaction] > Models > Virtual Mass Coefficient
Example Node Path	[phase interaction] > Models > Virtual Mass Coefficient
Requires	Physics continuum selections: Material: Multiphase Multiphase Model: Eulerian Multiphase (EMP) (Automatically activates: Multiphase Interaction, Gradients.) Two Eulerian phases are required. A Continuous-Dispersed Topology phase interaction is required. Phase interaction selections: Either: The Tchen Turbulence Response model activated in one of the phases selected for the phase interaction. Or: Optional Models: one of Virtual Mass Force, Turbulent Dispersion Force, Particle Induced Turbulence > Tchen Particle Induced Turbulence, Particle Induced Turbulence > Troshko and Hassan Particle Induced Turbulence Virtual Mass Coefficient: Virtual Mass Coefficient
Properties	Key property: Method. See Virtual Mass Coefficient Properties.
Activates	Model Controls	Virtual Mass Coefficient See Virtual Mass Coefficient Properties.
	Field Functions	See Virtual Mass Coefficient Field Functions.

Virtual Mass Coefficient Properties

Dimensions

The dimensionality of the virtual mass coefficient (read-only).

Method

The method to use for specifying the virtual mass coefficient.

Method	Corresponding Method Node
Spherical Particle Defines the virtual mass coefficient using the Spherical Particle method. This option is the default method.	Spherical Particle The following property is available: Free Stream Minimum Fraction Defines the freestream fraction that appears in Eqn. (2002). The default value is 0.0.
Zuber Defines the virtual mass coefficient using the Zuber method.	Zuber The following property is available: Free Stream Minimum Fraction Defines the freestream fraction that appears in Eqn. (2006). The default value is -10.0.

Virtual Mass Coefficient Field Functions

Virtual Mass Coefficient of [phase interaction]