Noninvasive measurement of viscosity from damping of capillary waves
Capillary waves, Fluid viscosity, Laser interferometry, Noninvasive measurement, Wave attenuation
Capillary waves are surface waves on fluids with wavelengths in the millimeter range. The determination of viscosity from the damping of capillary waves is of great practical importance as it affords the possibility of measuring the viscosity of fluids noninvasively. In this paper a noncontact method for generation and detection of capillary waves on fluid is described. A miniature laser interferometer is employed to measure noninvasively the wave amplitude and its attenuation with a resolution of about 10 nm. As a test case, the attenuation data for capillary waves on pure water are used to obtain the kinematic viscosity of water as a function of temperature. The results compare favorably with the most reliable published data on the subject. © 2003 ISA - The Instrumentation, Systems, and Automation Society.
Original Publication Date
DOI of published version
Behroozi, F.; Lambert, B.; and Buhrow, B., "Noninvasive measurement of viscosity from damping of capillary waves" (2003). Faculty Publications. 3353.