About the Homogenization Model

This section or topic is specific to Console Mode.

If you enter a spheroid phase when you configure your calculation, then the homogenization model is automatically used. This is useful when you want to simulate long-range diffusion through a multiphase mixture, under the assumption that local equilibrium holds at each node point.

You can also explicitly set the DICTRA module to use the HOMOGENIZATION_MODEL. This way, you can use it when calculating a one phase or a moving boundary simulation.

When the homogenization model is used, simulations are run using an implicit finite volume method to increase numerical stability. Because of this, and other factors, homogenization model simulations generally run slower than other comparable simulations. You can increase or decrease the Degree of implicity when integrating PDEs with the command SET_SIMULATION_CONDITION.

There are several special commands for use with this model.

If you have entered a spheroid phase in a region and want to use the older so-called dispersed system model, then you must explicitly disable the Homogenization Model after all phases have been entered.

• ADVANCED_HOMOGENIZATION_OPTIONS
• UTILITIES_HOMOGENIZATION
• SOLVE_IN_LATTICE_FIXED_FRAME
• DEPENDENT_ELEM_BALANCE_FLUXES
• BC_FOR_DEPENDENT_ELEMENT
• USE_TWO_TYPES_OF_BOUNDARY_CON