State of the Art

Abstract

In Chapter 2 the combine cleaning device and the separation process of grain and material other than grain based on vibro-fluidization are introduced. The most important influencing factors, characteristic values to describe the separation success as well as the necessary data base for the particle parameterization are compiled. Different methods to simulate dispersed multiphase flows are introduced together with their opportunities, limitations and required computational resources. Published investigations of numerical methods applied to separation process in combine harvester cleaning devices are summarized and discussed. The large number of influencing factors, their interactions, the wide range of scatter of properties, which is typical for biogenic particles, and the resulting complexity of the separation process drive the need for a strategic approach in order to create a valid simulation model.