Experiments on the water entry of asymmetric wedges using particle image velocimetry

Adel Shams, Mohammad Jalalisendi, Maurizio Porfiri

Research output: Contribution to journalArticle

Abstract

In this work, we experimentally characterize the water entry of an asymmetric wedge into a quiescent fluid through particle image velocimetry (PIV). The wedge enters the water surface with an orthogonal velocity falling from a fixed height. We systematically vary the heel angle to elucidate the effect of asymmetric impact on the flow physics and on the fluid-structure interaction. The pressure field in the fluid is reconstructed from PIV data by integrating the Poisson equation. We find that the impact configuration significantly influences both the velocity and the pressure field, ultimately, regulating the hydrodynamic loading on the wedge. Specifically, as the heel angle increases, the location of maximum velocity of the flow moves from the pile-up region to the keel. At the same time, the pressure field significantly decreases in the vicinity of the keel, reaching values smaller than the atmospheric pressure. The spatiotemporal evolution of the hydrodynamic loading is thus controlled by the heel angle, with larger heel angles resulting into more rapid and sustained impacts.

Original languageEnglish (US)
Article number1.4907745
JournalPhysics of Fluids
Volume27
Issue number2
DOIs
StatePublished - Feb 10 2015

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particle image velocimetry
entry
Velocity measurement
wedges
keels
pressure distribution
Hydrodynamics
water
Water
fluids
Fluids
Fluid structure interaction
Experiments
hydrodynamics
Poisson equation
Atmospheric pressure
Piles
piles
Physics
surface water

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Experiments on the water entry of asymmetric wedges using particle image velocimetry. / Shams, Adel; Jalalisendi, Mohammad; Porfiri, Maurizio.

In: Physics of Fluids, Vol. 27, No. 2, 1.4907745, 10.02.2015.

Research output: Contribution to journalArticle

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