Faculty Publications

Noncontact Measurement Of Viscosity

Document Type

Conference

Keywords

Capillary waves, Fluid viscosity, Noninvasive measurement, Wave attenuation

Journal/Book/Conference Title

ISA TECH/EXPO Technology Update Conference Proceedings

Volume

416

First Page

359

Last Page

368

Abstract

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. Here we describe a noninvasive method for generation and detection of capillary waves on fluids. Our technique utilizes a miniature laser interferometer to measure noninvasively the wave amplitude and its attenuation with a resolution of about ten nanometers. As a test case, the attenuation data for capillary waves on pure water is used to obtain the viscosity of water as a function of temperature.

Department

Department of Physics

Original Publication Date

1-1-2001

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