Filling rates of long liquid‐filled capillaries
作者:
J. Stone,
H. E. Earl,
期刊:
Journal of Applied Physics
(AIP Available online 1973)
卷期:
Volume 44,
issue 12
页码: 5642-5643
ISSN:0021-8979
年代: 1973
DOI:10.1063/1.1662218
出版商: AIP
数据来源: AIP
摘要:
Fused quartz capillaries 700 and 1200 m long and 100 &mgr;m in inside diameter have been filled under hydrostatic pressure. It is verified that the rate of filling is governed by Poiseuille's law, which predicts the filled length to be proportional to the square root of the filling time. At a pressure of 270 atm, 250 m was filled in 1 h, 800 m in 10 h, and 1200 m in 21 h. The filling rate cannot be increased significantly from the above values by increasing the pressure because of the increase in the viscosity of the fluid with increasing pressure. Since it requires high pressure to move the liquid in a long capillary, it is apparent that liquid will not flow out of a long capillary that is not under pressure.
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