Contactless mixing of electrically conductive liquids with magnetic fields plays an important role in metallurgical processes like crystal growth or casting. During the last years, the flow topology of different types of single and combined magnetic fields was investigated both experimentally and numerically. Because of the strong difference regarding the mean flow and turbulence distribution for various magnetic fields, an objective rating only based on velocity data is not possible. An additional investigation of the temporal development of scalar transport is necessary. For this purpose, we present a multi-scale mixing measure, which takes into account the intensity as well as the scales of segregation. The travelling magnetic field is used to demonstrate the advantages of this measure in comparison to the measure of variance.
展开▼
