The applications of lightweight metal parts require their compliance with ever increasing quality standards, particularly regarding their toughness and fatigue strength. In this respect, a high degree of melt cleanliness is a necessary condition. Detrimental inclusions are commonly captured by depth filtration of the melt, where ceramic foam filters are often used. An in-depth insight into the filtration process is essential in order to assess the effects of filter geometry and process conditions on the deposition of particles and to consequently improve the filtration efficiency. However, the physical and the chemical processes taking place inside the filter during casting are hardly accessible by conventional experimental techniques. On the other hand, numerical simulation provides a valuable means in order to study the spatially resolved flow and heat transfer characteristics as well as the deposition of inclusions. Since the filtration efficiency of a particular filter geometry can be easily evaluated, the numerical approach enables comprehensive parametric studies.
In the present study, the incompressible flow of liquid aluminium is solved by the lattice Boltzmann method...
Session: L12 - Depth and Cake Filtration - Numerical Simulation
Day: 12 October 2016
Time: 16:45 - 18:00 h