Large-scale experiments were conducted at the Coastal Research Centre (FZK), Germany to characterize the mechanics and characteristics of impact pressures due to breaking waves on a vertical sea wall with a recurve. The characteristics and distribution of impact pressure are found to be greatly depending on the breaking case, so the breaking wave impact is classified into different case like the slow breaking wave, breaking with small air trap and breaking wave with large air trap. When a small air is entrained between the breaking waves and the structure, there is a significant increase in impact pressures. However, if the entrapped air volume increases, impact pressure reduces because of the breaking of waves into smaller water droplets. The impact pressure variation at the vertical wall and recurve along the vertical direction are reported in different breaking cases from the experimental results and the relation between maximum impact pressures with respect to rise time is described by a power equation. © 2017, © 2017 Indian Society for Hydraulics.

V Sriram

Department of Ocean Engineering

R. Ravindar

S. Schimmels

D. Stagonas

OFFSHORE STRUCTURES

BREAKING WAVE IMPACTS

BREAKING WAVES

IMPACT PRESSURES

Large Scale

LARGE SCALE EXPERIMENTS

RECURVE

RESEARCH CENTRES

VERTICAL DIRECTION

Water waves

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Characterization of breaking wave impact on vertical wall with recurve

ISH Journal of Hydraulic Engineering

The large-scale experiments were conducted on a quasi-prototype vertical seawall attached with recurve in a large wave flume (GWK) with the slope of 1:10 to the study the breaking wave impact on the structure. Recurves are either curved parapets or walls with entirely curved seaward faces that are effective in reducing wave overtopping without increasing the crest height of the structure. The nondimensionalized impact pressure is plotted along the depth and compared to three recurves and breaking cases. The impact pressure and horizontal impact force compared with traditional theoretical design methodologies like Goda, Minikin, and Blackmore &amp; Hewson’s methods and the variations are reported. Pressure measurements obtained from tactile sensor/pressure pad are compared with a traditional pressure transducer. © Springer Nature Singapore Pte Ltd. 2019.

Lecture Notes in Civil Engineering

Comparative study of breaking wave forces on a quasi-prototype recurved seawall

A well tested mathematical model is used to bring out important counter intuitive results on the aspect of reducing tsunami impact forces on on-shore buildings using sea dikes. The mathematical model is based on numerical solution of the general Reynolds Averaged Navier Stokes equations, with SST–k–ω model for turbulence closure. Tsunami waves are allowed to propagate on a 1 in 40 sloped beach and over-top a sea dike before impacting on buildings. The combined effect of various parameters such as position of the dike and shape and size of the dike has been studied, for sloping beaches. A sea dike placed far from the building may increase the tsunami impact force, if its size is not appropriate. It is found that a sea dike positioned close to the building offers best protection only if the height of the wave is small. If the wave height is large, there is an optimal distance at which the dike should be located for minimizing the tsunami impact force. Placing a second sea dike in addition to an existing sea dike may not reduce the tsunami impact force, if the location and size of the sea dikes are not appropriate. © 2019 Elsevier Ltd

Ocean Engineering

Numerical investigations for mitigation of tsunami wave impact on onshore buildings using sea dikes

This paper presents the application of the Improved Meshless Local Petrov Galerkin method with Rankine source (Sriram and Ma, 2012) Sriram and Ma (2012) for wave interaction with porous structure model. The mathematical model is based on a unified governing equation that incorporates both pure fluid and porous region. The porous flow model is based on the empirical resistance coefficients. The interface between the pure fluid and porous region is numerically treated using background nodes having the porosity information and interpolated over the particle using simplified finite difference interpolation method. The model is validated using the available experimental results for wave damping over the permeable bed. The developed model is used to analyse the different shape of the seawall such as flaring shaped seawall, recurve wall and vertical wall. Then the validated model is used for analysing the overtopping amount due to the effect of porous layer in-front of the different sea wall profile. Numerical expression for overtopping amount has been provided for the different configurations from the numerical model. © 2017 Elsevier Ltd

Applied Ocean Research

Wave-porous structure interaction modelling using Improved Meshless Local Petrov Galerkin method

Coastal Engineering Proceedings

EXPERIMENTAL STUDY OF PRESSURE DISTRIBUTIONS DUE TO THE BREAKING WAVE IMPACTS

Coastal Engineering

Description of loading conditions due to violent wave impacts on a vertical structure with an overhanging horizontal cantilever slab

REDUCTION ON WAVE OVERTOPPING ON A SMOOTH DIKE BY MEANS OF A PARAPET

Who Was Who

Reed, Haythorne, (18 Aug. 1873–18 Oct. 1934)

Coastal Engineering 2006

EFFECT OF WIND ON WATER SPRAY AND WAVE OVERTOPPING GENERATED ABOVE FLARING SHAPED SEAWALL

Journal	Data powered by TypesetISH Journal of Hydraulic Engineering
Publisher	Data powered by TypesetTaylor and Francis Ltd.
ISSN	09715010
Open Access	No