MULTI_FIELD_MODEL
Specifies an equivalent material model for multifield simulation.
Type
AcuSolve Command
Syntax
MULTI_FIELD_MODEL("name") {parameters...}
Qualifier
Usergiven name.
Parameters
 field_interation_models (string) [=none]
 List of names of field interaction models that are applied to this material model. The name must refer to a defined field_interaction_model entry.
 specific_heat_type (enumerated) [=linear]
 Type of blending of the different material specific heat.
 linear
 Linear combination of the individual material specific heat weighted by their respective volume fraction.
 viscosity_type (enumerated) [=linear]
 Type of blending of the different material viscosity.
 linear
 Linear combination of the individual material viscosity weighted by their respective volume fraction.
 conductivity_type (enumerated) [=linear]
 Type of blending of the different material conductivity.
 linear
 Linear combination of the individual material conductivity weighted by their respective volume fraction.
 density_type (enumerated) [=linear]
 Type of blending of the different material density.
 linear
 Linear combination of the individual material density weighted by their respective volume fraction.
 harmonic

Harmonic combination of the individual material density weighted by their respective volume fraction.
 diffusivity_1_type (enumerated) [=linear]
 Type of blending of the different material scalar diffusivity (scalar 1).
 linear
 Linear combination of the individual material diffusivity for scalar 1 weighted by their respective volume fraction.
 diffusivity_2_type (enumerated) [=linear]
 Type of blending of the different material scalar diffusivity (scalar 2).
 linear
 Linear combination of the individual material diffusivity for scalar 2 weighted by their respective volume fraction.
 diffusivity_3_type (enumerated) [=linear]
 Type of blending of the different material scalar diffusivity (scalar 3).
 linear
 Linear combination of the individual material diffusivity for scalar 3 weighted by their respective volume fraction.
 diffusivity_4_type (enumerated) [=linear]
 Type of blending of the different material scalar diffusivity (scalar 4).
 linear
 Linear combination of the individual material diffusivity for scalar 4 weighted by their respective volume fraction.
 diffusivity_5_type (enumerated) [=linear]
 Type of blending of the different material scalar diffusivity (scalar 5).
 linear
 Linear combination of the individual material diffusivity for scalar 5 weighted by their respective volume fraction.
 diffusivity_6_type (enumerated) [=linear]
 Type of blending of the different material scalar diffusivity (scalar 6).
 linear
 Linear combination of the individual material diffusivity for scalar 6 weighted by their respective volume fraction.
 diffusivity_7_type (enumerated) [=linear]
 Type of blending of the different material scalar diffusivity (scalar 7).
 linear
 Linear combination of the individual material diffusivity for scalar 7 weighted by their respective volume fraction.
 diffusivity_8_type (enumerated) [=linear]
 Type of blending of the different material scalar diffusivity (scalar 8).
 linear
 Linear combination of the individual material diffusivity for scalar 8 weighted by their respective volume fraction.
 diffusivity_9_type (enumerated) [=linear]
 Type of blending of the different material scalar diffusivity (scalar 9).
 linear
 Linear combination of the individual material diffusivity for scalar 9 weighted by their respective volume fraction.
 immiscible_interface_type (enumerated) [=smooth]
 Type of interface modelling for multifield simulation.
 smooth
 The interface is diffused over a given distance with material properties transitioning smoothly between the different phases.
Description
This command specifies models to be used to compute the average properties for the fluid in multifield simulation.
MULTI_FIELD_MODEL commands are referenced by ELEMENT_SET
commands and replace the MATERIAL_MODEL used in single phase
simulation.
MULTI_FIELD_MODEL( "my multi fluid model" ) {
field_interaction_models = {"my FIM"}
density_type = linear
specific_heat_type = linear
viscosity_type = linear
immiscible_interface_type = smooth
}