On Measurement of Airy Waves by Tension Thread Flow Meter


  • Ai Nakagawa Academy of Hakusan, 2-14, Meiko, Hakusan 920-2152 Japan
  • Takeo Nakagawa Academy of Hakusan, 2-14, Meiko, Hakusan 920-2152 Japan


Flowmeter, Drag, Wheatstoe Bridge, Airy Wave, Oscillatory Flow


This paper is concerned with measurement of Airy waves by Tension Thread Flow Meter.

The utility and potential of the Tension Thread Flow Meter to measure water particle velocity ranging from 0 to 100 mm/s in the periodic oscillatory gravity waves, have been successfully demonstrated.   It is realized that Tension Thread Flow Meter can measure the velocity vector while the water particles are changing the direction from 0 to 360 .  It is found that comparing with other existing flowmeters Tension Thread Flow Meter is quite suitable to measure flow velocity very close to solid boundary.   It has been verified by measurements of waves with Tension Thread Flow Meter that the present data on waves show a good agreement with Airy wave theory. That is, it is inferred that both of Airy wave theory and the present flowmeter are reliable research means. It is suggested that these characteristic points together with the robustness of Tension Thread Flow Meter to be used both of laboratory and experiment are critical in the progress of flowmeter.


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Airy, G.B. (1845) Tides and Waves. in: Encyc. Metrop. pp.605. Alan, H.J (2001) Experimental Methods for Engineers. Boston: McGraw-Hill. ISBN 978-0-07-366055-4.

Bean, H. S. (1971) Fluid Meters: Their Theory and Application (6th ed.). New York: The American Society of Mechanical Engineers, 77–78. Baker, R. C. (2016) Flow Measurement Handbook. Cambridge University Press. ISBN 978-1-107-04586-6

Chanson, H. (2008) Acoustic Doppler Velocimetry (ADV) in the Field and in Laboratory: Practical Experiences. in Frédérique Larrarte and Hubert Chanson, Experiences and Challenges in Sewers: Measurements and Hydrodynamics. International Meeting on Measurements and Hydraulics of Sewers IMMHS'08, Summer School GEMCEA/LCPC, Bouguenais, France, 19–21 August 2008, Hydraulic Model Report No. CH70/08, Div. of Civil Engineering, The University of Queensland, Brisbane, Australia, Dec., 49–66. ISBN 978-1-86499-928-0. Archived

Drost, CJ (1978) Vessel Diameter-Independent Volume Flow Measurements Using Ultrasound. Proceedings of San Diego Biomedical Symposium. 17: 299–302. Adrian, R. J. (1993); Selected on Laser Doppler Velocimetry, S.P.I.E. Milestone Series, ISBN 978-0-8194-1297-3

Miller, R.W. (1996) Flow Measurement Engineering Handbook (3rd ed.). McGraw Hill. 6.16–6.18. ISBN 0070423660.

Nakagawa, A., Nakagawa, T.R.M. (2020a) On drag of circular cylinder suspended in uniform viscous flow. To Physics J. (to appear).

Nakagawa, A., Nakagawa, T.R.M. (2020b) Role of Wheatstone bridge in velocity measurement with Tension Thread Flow Meter. Social Sci. J. (Submitted for publication).

Nakagawa, T. (1983a) On characteristics of the water-particle velocity in a plunging breaker. J. Fluid Mech. 126, 251-268. https://doi.org/10.1017/S0022112083000142

Nakagawa, T. (1983b) A new instrument to measure three velocity components of water particles in breaking waves. J. Physics E: Sci. Instruments. 16, 162-163. https://doi.org/10.1088/0022-3735/16/2/013

Sharp、B.B. (1964) Flow measurement with a suspension wire. Proc. ASCE, HY2, 90, 37-53.

Sleath, J.F.A. (1969) A device for velocity measurement in oscillatory boundary layers in water. J. Phys. E: Sci. Instruments. 2, 446-448. https://doi.org/10.1088/0022-3735/2/5/425




How to Cite

Ai Nakagawa, & Takeo Nakagawa. (2020). On Measurement of Airy Waves by Tension Thread Flow Meter. To Physics Journal, 6, 88-95. Retrieved from https://purkh.com/index.php/tophy/article/view/879



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