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Experimental analysis of slow viscous flow using photoviscosity and bubbles

The double-exposure bubble technique is found to be a powerful tool for the determination of the velocity field in three-dimensional problems

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Abstract

Photoelasticity in solids is a well-developed technique for stress and strain analysis. Less progress has been made in applying a similar effect, photoviscosity, to flow analysis. This paper has three objects: (1) to simplify photoviscous methods; (2) to compare velocity profiles obtained from photoviscosity with those obtained by the double-exposure bubble technique; (3) to determine the principal strain rates and the maximum shear stress from photoviscotity. The problem of slow viscous flow about a cylindrical obstacle in a rectangular channel was selected for the comparison. The fluid was a suspension of milling yellow dye in water. Strain rates and stresses averaged over the path of ligh can be obtained easily using photoviscosity. The bubble technique is shown to be a very powerful tool that permits the determination of the velocity field in three-dimensional problems.

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Authors and Affiliations

  1. Civil and Mechanical Engineering Department, Catholic University of America, 20017, Washington, D.C.

    A. J. Durelli (Professor) & J. S. Norgard (Post-doctoral Fellow)

Authors
  1. A. J. Durelli
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  2. J. S. Norgard
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Durelli, A.J., Norgard, J.S. Experimental analysis of slow viscous flow using photoviscosity and bubbles. Experimental Mechanics 12, 169–177 (1972). https://doi.org/10.1007/BF02330269

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  • DOI: https://doi.org/10.1007/BF02330269

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