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Shear Measurement Technique for Rough Surfaces
Preston's technique of using a pitot tube that touches the boundary in order to measure the local shear has been extended to rough surfaces. An analysis, assuming the logarithmic velocity distribution, provides an estimate of the relationship between the dynamic-pressure reading and the intensity of shear. Experiments with sandpaper-roughened surfaces confirm the general nature of the analytical relationship and provide correction factors that could be used for surfaces of a similar texture. For other surface types, the relationships can be used for qualitative studies, but calibration would be necessary to obtain absolute values of shear.
Shear Measurement Technique for Rough Surfaces
Preston's technique of using a pitot tube that touches the boundary in order to measure the local shear has been extended to rough surfaces. An analysis, assuming the logarithmic velocity distribution, provides an estimate of the relationship between the dynamic-pressure reading and the intensity of shear. Experiments with sandpaper-roughened surfaces confirm the general nature of the analytical relationship and provide correction factors that could be used for surfaces of a similar texture. For other surface types, the relationships can be used for qualitative studies, but calibration would be necessary to obtain absolute values of shear.
Shear Measurement Technique for Rough Surfaces
Hwang, Li-San (author) / Laursen, Emmett M. (author)
Journal of the Hydraulics Division ; 89 ; 19-37
2021-01-01
191963-01-01 pages
Article (Journal)
Electronic Resource
Unknown
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