The complex, multi-part nature of waste glass melters used in nuclear waste vitrification poses significant

modeling challenges. The focus of this project has been to couple a 1D MATLAB model of the cold cap

region within a melter with a 3D STAR-CCM+ model of the melter itself. The Multiphysics Integrated

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Coupling Environment (MICE), shown below, has been developed to create a cohesive simulation of a waste

glass melter that accurately represents the cold cap. The one-dimensional mathematical model of the cold cap

uses material properties, axial heat, and mass fluxes to obtain a temperature profile for the cold cap, the region

where feed-to-glass conversion occurs. The results from Matlab are used to update simulation data in the

three-dimensional STAR-CCM+ model so that the cold cap is appropriately incorporated into the 3D

simulation. The two processes are linked through ModelCenter integration software using time steps that are

specified for each process. Data is to be exchanged circularly between the two models, as the inputs and

outputs of each model depend on the other.

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