Prediction of Conditions Under Which Flow Instabilities Are Onset to Give Rise to Extrudate Distortions during the Extrusion of Highly Filled Energetic Suspensions

Extrudate distortions upon exit from the die in batch or continuous processing are commonly encountered and very difficult to correct on a trial and error basis. Here a time dependent source code is introduced which allows the conditions under which flow instabilities are onset in extrusion processes. Comparisons of theory versus experiments will be presented for various well-defined suspensions.