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According to the ``common'' model, the gate velocity decreases when the plunger diameter increases. Conversely, the gate velocity increases when the plunger diameter decreases9. According to equation ([*]) the liquid metal flow rate at the gate increases as well. However, according to the ``common'' diagram, the plunger can move only in a finite velocity lets say in the extreme case 10. Therefore, the flow rate at the plunger tip decreases. Clearly, these diametrically opposing trends cannot coexist. Either the ``common'' diagram wrong or the mass balance concept is wrong, take your pick.

Genick Bar-Meir |||
copyright Dec , 2006

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