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3. Flow modeling
The literature contains a number of flow models for counter-rotating twin-screw extruders. Naturally, these models differ according to the type of machine and whether the focus is on a local description of the flow or on the process as a whole. From a historical point of view, it was interpenetrating configurations with wide threads that were first studied, due to their widespread use in the case of PVC. So we'll start with these.
3.1 Interlocking screws
We saw in paragraph 2.2
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Flow modeling
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