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

• Main Author: D. Lakehal
• Format: Article
• Language: English
• Published: Isfahan University of Technology 2011-01-01
• Series: Journal of Applied Fluid Mechanics
• Subjects: Multi-phase; Multi-physics; TransAT; CMFD
• Online Access: http://jafmonline.net/JournalArchive/download?file_ID=15296&issue_ID=204

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.