Interaction between wave and coastal structure: Validation of two lagrangian numerical models with experimental results marine 2011

Numerical modeling of the interaction among waves and coastal structures is a challenge due to the many nonlinear phenomena involved, such as, wave propagation, wave transformation with water depth, interaction among incident and reflected waves, run-up / run-down and wave overtopping. Numerical models based on Lagrangian formulation, like SPH (Smoothed Particle Hydrodynamics), allow simulating complex free surface flows. The validation of these numerical models is essential, but comparing numerical results with experimental data is not an easy task. In the present paper, two SPH numerical models, SPHysics LNEC and SPH UNESP, are validated comparing the numerical results of waves interacting with a vertical breakwater, with data obtained in physical model tests made in one of the LNEC's flume. To achieve this validation, the experimental set-up is determined to be compatible with the Characteristics of the numerical models. Therefore, the flume dimensions are exactly the same for numerical and physical model and incident wave characteristics are identical, which allows determining the accuracy of the numerical models, particularly regarding two complex phenomena: wave-breaking and impact loads on the breakwater. It is shown that partial renormalization, i.e. renormalization applied only for particles near the structure, seems to be a promising compromise and an original method that allows simultaneously propagating waves, without diffusion, and modeling accurately the pressure field near the structure.

An annotated bibliography of CERC coastal ecology research /

Includes indexes.

Coastal changes, eastern Lake Michigan, 1970-1974 /

"January 1981."

Analysis of coastal sediment transport processes from Wrightsville Beach to Fort Fisher, North Carolina /

A comprehensive engineering analysis of the coastal sediment transport processes along a 42-kilometer segment of the North Carolina shoreline from Wrightsville Beach to Fort Fisher is presented. Included in the analysis is an interpretation of the littoral processes, longshore transport, and the behavior and success of beach nourishment projects at Wrightsville Beach and Carolina Beach, North Carolina. The historical position of the MLW, MSL, and MHW contours, relative to a fixed base line, is plotted for the period between 1964 and 1975. An equivalent volumetric erosion or accretion between successive surveys is determined by multiplying the average excursion distance of the contours by a constant of proportionality. The plots of excursion distance versus time for the MLW, MSL, and MHW contours also show the time response of the beach fills. This response is described by a mathematical function. The alongshore components of wave-induced energy flux are also determined within the study area through wave refraction analysis. This information, together with the information on volumetric change, is used in a sediment budget analysis to determine the coefficient of alongshore sediment transport and the inlet trapping characteristics. (Author).

An ERTS-1 study of coastal features on the North Carolina coast /

"January 1976."

An annotated bibliography of CERC coastal ecology research /

Includes indexes.

A numerical model to simulate sediment transport in the vicinity of coastal structures /

Cover title.

A user's guide to the N-line model : a numerical model to simulate sediment transport in the vicinity of coastal structures /

"August 1987."

Survey of coastal revetment types /

"May 1976."

An annotated bibliography on the biological effects of constructing channels, jetties, and other coastal structures /

Includes index.

Stability test of modified repair options for San Pedro Breakwater, Los Angeles, California : coastal model investigation /

"July 1986."

Coastal processes at Sea Bright to Ocean Township, New Jersey.

"August 1988."

Monitoring completed coastal projects : operational assessment of floating breakwaters, Puget Sound, Washington /

"April 1988."

Engineering analysis of beach erosion at Homer Spit, Alaska /

Includes abstract.

Measurement techniques for coastal waves and currents /

"November 1976."