Process Abstraction, Parameterization and Sensitivity

In Chapter 4, the separation process is approximated on a high level. A downsized domain with a reduced ground surface area is used. The separation is carried out as a batch system with pure vertical mechanical oscillation and air flow, which enables to suppress horizontal transportation process and to isolate working mechanisms of vertical separation. The numerical tests contain particles for grain, chaff and short straw, designed and parameterized based on literature review. The downsized domain is used on the one hand to perform preliminary tests to find an appropriate standard configuration. On the other hand, the most influencing basic material and interphase parameters are identified in the context of a parameter sensitivity study. By the comparison to corresponding experimental tests, the general applicability of the numerical method and the need for further research are evaluated.