MEASUREMENT OF THE RELAXATION-TIME IN DARCY FLOW

被引：13
|
作者：
REHBINDER, G
机构：
[1] Department of Hydraulics, The Royal Institute of Technology, Stockholm
来源：
TRANSPORT IN POROUS MEDIA | 1992年 / 8卷 / 03期
关键词：
DARCY LAW; INERTIAL EFFECT; NONSTEADY FLOW;
D O I：
10.1007/BF00618545
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The inertia of a liquid flowing through a porous medium is normally ignored, but if the acceleration is great, it may be important. The relaxation time, defined so that it alone accounts for the inertia, has been determined experimentally with a simple oscillator. A U-Tube is provided with a porous plug and filled with a liquid. During pendulation of the liquid, the frequency and the damping define the relaxation time. The measured value of the relaxation time is about 10 times the theoretical estimate derived from Navier-Stokes equation.
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页码：263 / 275
页数：13
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