ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
Capillary and short gravity water waves generated in the range of 7–45 Hz by pulsating air from a loudspeaker have been measured using an electrical surface potential probe placed a fixed distance of 0.4 mm above the mean water surface. The surface potential wave gauge (measuring wave amplitude) is compared to a wire resistance-type gauge (measuring wave amplitude) and a laser gauge (measuring wave slope). The wave gauges show good agreement for the capillary waves measured. Gravity water waves with frequencies of 1.0, 1.5, and 1.8 Hz and heights of 1–3 cm could also be successfully measured with the surface potential probe fixed 2.5 cm above the mean water surface. Measurements of waves generated by 2.5-, 4.0-, and 6.0-m/s winds showed that spectra recorded by the surface potential probe qualitatively agree with those of the wire wave gauge when the surface potential probe's height above the mean water surface is adjusted in accordance with the wind speed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1138836
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