Author
Atsushi Arami
Bio: Atsushi Arami is an academic researcher. The author has contributed to research in topics: Breaking wave & Impact pressure. The author has an hindex of 1, co-authored 1 publications receiving 207 citations.
Topics: Breaking wave, Impact pressure, Pressure measurement
Papers
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TL;DR: In this article, the authors studied the physics and characteristics of impact pressure due to collisions of breaking waves against a vertical wall and found that when a small amount of air is entrapped between the breaking wave and the wall at the collision, the impact pressure increases considerably.
236 citations
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Book•
19 May 2005TL;DR: In this article, the authors present a detailed review of liquid sloshing dynamics in rigid containers, including linear forced and non-linear interaction under external and parametric excitations.
Abstract: Preface Introduction 1. Fluid field equations and modal analysis in rigid containers 2. Linear forced sloshing 3. Viscous damping and sloshing suppression devices 4. Weakly nonlinear lateral sloshing 5. Equivalent mechanical models 6. Parametric sloshing (Faraday's waves) 7. Dynamics of liquid sloshing impact 8. Linear interaction of liquid sloshing with elastic containers 9. Nonlinear interaction under external and parametric excitations 10. Interactions with support structures and tuned sloshing absorbers 11. Dynamics of rotating fluids 12. Microgravity sloshing dynamics Bibliography Index.
920 citations
TL;DR: In this paper, the authors focus on the results of theoretical work, making particular note of the value of considering pressure impulse, and highlight the aspects that are poorly understood, including the role of entrained and trapped air in wave impacts.
Abstract: ▪ Abstract The more violent impacts of water waves on walls create velocities and pressures having magnitudes much larger than those associated with the propagation of ordinary waves under gravity. Insight into these effects has been gained by irrotational-flow computations and by investigating the role of entrained and trapped air in wave impacts. This review focuses on the results of theoretical work, making particular note of the value of considering pressure impulse, and highlights the aspects that are poorly understood.
344 citations
TL;DR: In this paper, the authors proposed modified MPS methods for the prediction of wave impact pressure on a coastal structure by introducing new formulations for the pressure gradient and a new formulation of the source term of the Poisson Pressure Equation (PPE).
288 citations
TL;DR: In this paper, the effects of entrained and entrapped air on wave impacts are investigated and the characteristics of the impacts depend on the breaker conditions and four different types of impact are identified and discussed.
265 citations
TL;DR: In this article, a mathematical model for the high pressures and sudden velocity changes which may occur in the impact between a region of incompressible liquid and either a solid surface or a second liquid region is presented.
Abstract: A mathematical model is presented for the high pressures and sudden velocity changes which may occur in the impact between a region of incompressible liquid and either a solid surface or a second liquid region. The theory rests upon the well-known idea of pressure impulse, for the sudden initiation of fluid motion in incompressible fluids. We consider the impulsive pressure field which occurs when a moving fluid region collides with a fixed target, such as when an ocean wave strikes a sea wall. The boundary conditions are given for modelling liquid-solid and liquid-liquid impact problems. For a given fluid domain, and a given velocity field just before impact, the theory gives information on the peak pressure distribution, and the velocity after impact. Solutions for problems in simple domains are presented, which give insight into the peak pressures exerted by a wave breaking against a sea wall, and a wave impacting in a confined space. An example of liquid-liquid impact is also examined. Results of particular interest include a relative insensitivity to the shape of the incident wave, and an increased pressure impulse when impact occurs in a confined space. The theory predicts that energy is lost from the bulk fluid motion and we suggest that this energy can be transferred to a thin jet of liquid which is projected away from the impact region.
216 citations