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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 decreases^{9}.
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 ||| www.potto.org
*

copyright Dec , 2006

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