Savino 9 Tracking of immiscible interfaces in two - phase material mixing processes
نویسنده
چکیده
This chapter presents a review of tracking methods for the modelling of immiscible interfaces and analyses the fluid flow aspects of a new application of a twin-screw extruder (TSE) in the rheomixing process. It also simulates fundamental micro-mechanisms of the rheological behaviour of immiscible liquid alloys with piecewise linear interface construction (PLIC) volume-of-fluid (VOF) methods on Eulerian grids in two and three-dimensional two-phase processes. The method is coupled with the continuum surface force (CSF) algorithm for surface force modelling, supported by a multi-grid solver that Correspondence/Reprint request: Prof. H. Tang, College of Energy and Power, Nanjing University of Aeronautics and Astronautics, Jiangsu, 210016, China. E-mail: [email protected] H. Tang & L.C. Wrobel 226 enables the resolution of large density ratio between the fluids and fine scale flow phenomena. A numerical modelling procedure for investigation of immiscible binary liquid alloy flows in shear-induced mixing is established and evaluated through various immiscible flow cases for maintaining sharp interfaces in the meso-/micro-scale. Numerical results show good qualitative agreement with experimental results. It is concluded that immiscible interfaces in two-phase material mixing can be numerically simulated, and the results are useful for optimisation of the material design and operation processes.
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