Why is chaotic advection a necessary basis for smart blending methods? Also, what does advection mean?
In all blending processes, melt domains must be stretched. However, with smart blending methods, we also want to organize the melt domains in lieu of directly dispersing them as occurs in conventional equipment. Chaotic advection stretches and folds melt domains and can occur even in response to simple flow fields. Initially large melt bodies of immiscible plastics become converted to a multilayer arrangement. Such multilayers can be useful, but they are also a parent structure to a wide variety of other structures. The layers undergo changes in shape. When this occurs, changes can occur volumetrically inside smart blenders. Such transitions can be promoted by controlling stir rod motions in smart blenders. Consider, for example, the resultant structure if small ruptures form in all layers of a multi-layer melt once they become very thin. The ruptures are filled with melt from adjacent layers so previously isolated layers become interconnected. Upon extrusion, the properties of both th
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