Chapter
Apr 26, 2012
Acceleration and Pressure Measurements during Wave-Structure Interactions
Authors: Kuang-An Chang, Monroe Weber-Shirk, Edwin A. Cowen, Philip L.-F. Liu, and Aaron R. BlakeAuthor Affiliations
Publication: Coastal Engineering 2000
Abstract
This paper presents a particle image velocimetry (PIV) based measurement technique for flow acceleration. Based on the illumination of seeding particles three times over two frames and continuously tracking an individual particle over the three distinct illuminations, two velocity fields and a Lagrangian acceleration are obtained. Subsequently, the dynamic pressure can be calculated by integrating the Lagrangian acceleration through the Euler equation, provided that the fluid is incompressible and the flow is inviscid. The technique not only provides a method for acceleration measurement but also reduces the constraint on the time separation between adjacent illumination pulses imposed by the camera framing rate in a single pulsed triple-frame technique to a much shorter camera specific frame transfer time. Monte Carlo simulations are used to test the technique for a deep water wave.
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© 2001 American Society of Civil Engineers.
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Published online: Apr 26, 2012
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Kuang-An Chang
Assistant Professor, Department of Civil Engineering, Texas A&M University, College Station, TX 77843-3136, U.S.A.
Monroe Weber-Shirk
Lecturer, School of Civil and Environmental Engineering, Cornell University, Ithaca, NY 14853, U.S.A.
Edwin A. Cowen
Assistant Professor, School of Civil and Environmental Engineering, Cornell University, Ithaca, NY 14853, U.S.A.
Philip L.-F. Liu
Professor, School of Civil and Environmental Engineering, Cornell University, Ithaca, NY 14853, U.S.A.
Aaron R. Blake
Undergraduate Research Assistant, School of Civil and Environmental Engineering, Cornell University, Ithaca, NY 14853, U.S.A.
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