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Compressible laminar flow in a capillary

Published online by Cambridge University Press:  26 April 2006

H. R. van den Berg ,
C. A. ten Seldam  and
P. S. van der Gulik
H. R. van den Berg
Affiliation:
Van der Waals Laboratory, University of Amsterdam, Valckenierstraat 67, 1018 XE Amsterdam, The Netherlands
C. A. ten Seldam
Affiliation:
Van der Waals Laboratory, University of Amsterdam, Valckenierstraat 67, 1018 XE Amsterdam, The Netherlands
P. S. van der Gulik
Affiliation:
Van der Waals Laboratory, University of Amsterdam, Valckenierstraat 67, 1018 XE Amsterdam, The Netherlands
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Abstract

An equation based on the hydrodynamical equations of change is solved, analytically and numerically, for the calculation of the viscosity from the mass-flow rate of a steady, isothermal, compressible and laminar flow in a capillaiy. It is shown that by far the most dominant correction is that due to the compressibility of the fluid, computable from the equation of state. The combined correction for the acceleration of the fluid and the change of the velocity profile appears to be 1.5 times larger than the correction accepted to date.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 246 , January 1993 , pp. 1 - 20
Copyright
© 1993 Cambridge University Press

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