Free molecular flow

Free molecular flow describes the fluid dynamics of gas where the mean free path of the molecules is larger than the size of the chamber or of the object under test. For tubes/objects of the size of several cm, this means pressures well below 10 Torr. This is also called the regime of high vacuum. This is opposed to viscous flow encountered at higher pressures.

单词	Free molecular flow
释义	Free molecular flow 英语百科 Free molecular flow Free molecular flow describes the fluid dynamics of gas where the mean free path of the molecules is larger than the size of the chamber or of the object under test. For tubes/objects of the size of several cm, this means pressures well below 10 Torr. This is also called the regime of high vacuum. This is opposed to viscous flow encountered at higher pressures.
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