New Trends in Multiscale and Multiphysics Simulation of Transport Phenomena in Novel Engineering Systems

The paper reports on the progress made in predicting large- and small-scale single and two-phase flows with heat transfer using the cmfd code transat. in the multi-phase context, the code uses the level set approach as the “interface tracking method” of reference. the solver incorporates phase-change capabilities, surface tension and triple-line dynamics models, marangoni effects, electric and magnetic fields, and a wall micro-film sub-grid scale model for lubrication. complex 3d examples shown here were treated using a fully automatized version of the code, using the immersed surfaces technique (ist) to map complex components into a simple rectangular cartesian grid. it is shown that real coupled two-phase heat transfer (conjugate) problems are within reach of modern cmfd code using interface tracking, with relatively fast response times: 3d coupled two-phase flow heat transfer can run on a simple linux pc cluster within 24 h time.