Melting-Solidification Model Reference

Table 1. Melting-Solidification Model Reference
Theory	See Melting and Solidification
Provided By	[fluid film phase] > Models > Optional Models
Example Node Path	Continua > Physics 1 > Models > Fluid Film > [fluid film phase] > Models > Melting-Solidification
Requires	The Fluid Film model activated in the physics continuum. The appropriate energy model activated: For a Coupled Flow simulation, Coupled Energy. For a Segregated Flow simulation, either Segregated Fluid Temperature, Segregated Fluid Isothermal, or Segregated Fluid Enthalpy. In the fluid film Phase Model Selection dialog: Space: Three Dimensional Fluid Film Flow: Flow Model Material: Liquid, Multi-Component Liquid, or Liquid-Solid-Gas Mixture Fluid Film Energy: For a Coupled Flow simulation, Coupled Temperature; For a Segregated Flow simulation, Segregated Fluid Film Temperature Optional Models: Melting-Solidification
Properties	See Melting-Solidification Model Properties.
Activates	Physics Models	Solidified Film Removal See Solidified Film Removal Properties.
	Model Controls (child nodes)	Liquid-Solid Component Mapping Appears when the Fluid Film phase material is Liquid-Solid-Gas Mixture. Solid Density Appears under the Solidified Film Removal node.
	Material Properties	Fraction Solid Curve Latent Heat of Fusion When the Fluid Film phase material is Liquid-Solid-Gas Mixture, the only available method is Heat of Formation. This value is the difference between the Heat of Formation that is specified for the liquid component and that which is specified for the solid component. Liquidus Temperature Solidus Temperature It is good practice to use a field function for the viscosity and thermal conductivity of the film, since the values of these properties differ for liquid and solid states. Make these properties a function of either relative solid volume fraction or temperature.
	Field Functions	See Melting-Solidification Model Field Functions.

Melting-Solidification Model Properties

Linearize Melting: When activated, this property linearizes the influence of latent heat.
Under-Relaxation Factor: At each iteration, this property governs the extent to which the newly computed solution supplants the old solution.

Liquid-Solid Component Mapping

Available when the Fluid Film phase material is Liquid-Solid-Gas Mixture.

Transferred Components: Specifies the mapping between the liquid and the solid components.

Solidified Film Removal Properties

Specifies how the solidified mass is treated in the simulation. When this model is activated, the solidified mass is removed according to the method that is specified in the Solid Density node. All of the mass that remains in the fluid film is liquid.

When this model is not activated, the fluid film is treated as a homogeneous mixture of solidified mass and liquid.

Smoothing Steps: If the Morpher is enabled, this property affects the smoothing of the morphed surface that is used to model the surface of the solidified mass. At each iteration, the smoothing process is repeated the specified number of times.
Solid Time-step Factor: If the Morpher is enabled, this property scales the morphing speed of the morphed surface that is used to model the surface of the solidified mass. In practical solidification simulations, the morphing of the solidified mass front is typically so small that it does not noticeably influence the solution at each time step. This setting lets you speed up the calculation by the specified factor. For example, by setting this factor to 10, and reducing the Maximum Physical Time by the same factor, you can obtain (to good approximation) the same solidified mass shape, but approximately 10 times faster.

Melting-Solidification Model Field Functions

The following primitive field function is made available when the Fluid Film Melting-Solidification model is activated.

Relative Solid Volume Fraction: The volume fraction of the fluid film that is in the solid state.

Solid Density Properties

Method

Specifies the density of the solid.

For Liquid and Multi-Component Liquid material, the default is Liquid, which sets the density of the solid to be identical to the density of the liquid. Alternatively, you can specify the solid density as constant or field function.

For Liquid-Solid-Gas material, the only available method is Solid, which sets the density of the solid to that of the solid component of the material.