Backward Compatibility with Version 4.3a

Mixture Model Equation Formulation

The Mixture Model equation formulation has been revised to increase the accuracy and facilitate the solution of a number of problem setups. As a consequence of the revision, old models can return slightly different results in the new version than they did in previous versions. As part of the revision, a penalty diffusion on the dispersed phase has been deactivated, because after the other revisions, it made the equation system too nonlinear and therefore more difficult to converge. However, you can still activate the penalty diffusion in the Advanced section of the Mixture Model physics interface settings.

Euler-Euler Model, Laminar Flow

The results from models using the Euler-Euler Model, Laminar Flow interface may differ in version 5.2a due to the more general formulation for the viscous stress in the momentum equation for the dispersed phase. The behavior in the old formulation may be reproduced by dividing the dispersed phase viscosity, μD, by the variable ee.phidPos.