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Void Fraction Measurment Beneath a Stationary Breaking Wave

Waniewski, Tricia A. and Brennen, Christopher E. and Raichlen, Frederic (1998) Void Fraction Measurment Beneath a Stationary Breaking Wave. In: 1998 ASME Fluids Engineering Division Summer Meeting, 21-25 June 1998, Washington, DC, USA.

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Impedance based techniques have been used to quantify air entrainment by a stationary breaking wave at the bow of a ship. The present paper describes an impedance based void fraction meter which was developed to make measurements in this high speed, unsteady, multiphase flow, and details of its calibration are provided. In addition, air entrainment data from an experimental simulation of a bow wave are presented. The local, time averaged void fraction was mapped for flow cross sections beneath the plunging wave jet, revealing the location of the clouds of bubbles formed by that jet impacting the incoming water surface. Size distribution functions for the bubbles within the bubble clouds are also presented. The results are correlated with the wave structure described in Waniewski et al. (1997).

Item Type:Conference or Workshop Item (Paper)
Additional Information:The authors wish to acknowledge Dr. Steven Ceccio for assistance in developing tbe IVFM electronics, Hai Vu for assistance in developing the electronics and the IVFM probe, Dr Sudipto Sur for assistance with signal processing, and Dr. Roberto Zenit for assistance with the two phase flow test facility. They are also grateful for the support of the Office of Naval Research under grant number N00014-94-l-1210.
Record Number:CaltechAUTHORS:WANfedsm98
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:161
Deposited By: Christopher Brennen
Deposited On:09 Nov 2004
Last Modified:02 Oct 2019 22:29

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