Dearl all,
I´ve used Comsol version 4.4 for generation of a electric field distribution coupled with temperature and fluid dynamic in a coaxial treatment chamber for liquid sterilization purposes. A electric pulse is applied on two electrodes of the treatment chamber. The model works fine when is used only the coupling between temperature and electric field (without fluid dynamics) by heat tranfer physic.
When it is inserted the physic non-isothermal flow or laminar flow (from single phase flow in the model), Comsol generates the following error message: *Repeated error test failures. May have reached a singularity. Time : 0 Last time step is not converged. I have used a normal Mesh.
I have also a adittional doubt about coupling temperature and laminar flow from single phase flows using Comsol version 4.4. I did not find a option to couple heat transfer and laminar flow with this version using multiphysics nodes.
It follows attached the mph file.
Best regards
Eduardo