Next Article in Journal
Variations in Microbial Community Structure through the Stratified Water Column in the Tyrrhenian Sea (Central Mediterranean)
Next Article in Special Issue
The Tsunami Vulnerability Assessment of Urban Environments through Freely Available Datasets: The Case Study of Napoli City (Southern Italy)
Previous Article in Journal
The Dynamics, Ecological Variability and Estimated Carbon Stocks of Mangroves in Mahajamba Bay, Madagascar
Previous Article in Special Issue
A Numerical Modelling Study on the Potential Role of Tsunamis in the Biblical Exodus
Article Menu

Export Article

Open AccessArticle
J. Mar. Sci. Eng. 2015, 3(3), 821-844; doi:10.3390/jmse3030821

Long Wave Flow Interaction with a Single Square Structure on a Sloping Beach

1
Coastal Research Station, Lower Saxony Water Management, Coastal Defense and Nature Conservation Agency, An der Mühle 5, Norderney D-26548, Germany
2
Franzius-Institute for Hydraulic, Estuarine and Coastal Engineering, Leibniz University Hannover, Nienburger Straße 4, Hannover D-30167, Germany
3
Department of Civil Engineering, University of Ottawa, 161 Louis Pasteur, Ottawa, ON K1N 6N5, Canada
*
Author to whom correspondence should be addressed.
Academic Editor: Valentin Heller
Received: 21 June 2015 / Accepted: 29 July 2015 / Published: 5 August 2015
(This article belongs to the Special Issue Tsunami Science and Engineering)
View Full-Text   |   Download PDF [11996 KB, uploaded 5 August 2015]   |  

Abstract

In the context of dam breaks, tsunami, and flash floods, it is paramount to quantify the time-history of forces by the rapidly transient flow to vertical structures and the characteristics of the induced flow patterns. To resemble on-land tsunami-induced flow, a free-surface-piercing structure is exposed to long leading depression waves in a tsunami flume where long waves run up and down a 1:40 smooth and impermeable sloping beach after its generation by a volume-driven wave maker. The structure and its surrounding were monitored with force transducers, pressure gauges and cameras. Preparatory steady-state experiments were accomplished to determine the drag force coefficient of the square cylinder at various water depths. The flow during wave run-up and draw-down acting on the structure resulted in distinct flow pattern which were characteristic for the type of flow-structure interaction. Besides bow wave propagating upstream, a standing or partially-standing wave was observed in front of the structure together with a wake formation downstream, while a von Kármán vortex street developed during the deceleration phase of the flow motion and during draw-down. Force measurements indicated a sudden increase in the stream-wise total force starting with the arrival of the flow front during initial run-up. Lateral velocities showed significant oscillations in correlation with the von Kármán vortex street development. A comparison of the total measured base force with the analytically-calculated share of the drag force revealed that forces were prevailingly drag-dominated. View Full-Text
Keywords: tsunami on land flow; flow-structure interaction; vortex shedding; drag force; inertia force tsunami on land flow; flow-structure interaction; vortex shedding; drag force; inertia force
Figures

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Bremm, G.C.; Goseberg, N.; Schlurmann, T.; Nistor, I. Long Wave Flow Interaction with a Single Square Structure on a Sloping Beach. J. Mar. Sci. Eng. 2015, 3, 821-844.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
J. Mar. Sci. Eng. EISSN 2077-1312 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top