Upcoming Projects

PI

Co-PI(s)
Diane Foster, U New Hampshire

Patrick Lynett (USC), Tian-Jian (Tom) Hsu (U Delaware)
Title NEESR: Tsunami Induced Coherent Structures and their Impact on our Coastal Infrastructure
What The overarching theme of this effort is to formulate the complex processes affecting our coastal structures that are driven or affected by turbulent coherent structures (TCS). The role of wall bounded TCS in multiple forcing environments will be examined. Near the seabed, sediment pickup and transport can be significantly enhanced by TCS, leading to extreme scour and infrastructure failure. In the horizontal plane, TCS can appear as giant whirlpools and are commonly associated with extreme damage in ports and harbors. Extensive experiments will be performed at the Oregon State University, using the Large Wave Flume to study the fine detail of TCS significance on nearbed processes, such as mobilization and transport of sediment, as well as the Tsunami Wave Basin to characterize the complete hydrodynamic structure of a large, horizontal TCS generated by a port. The observations will be complimented with a wide-reaching numerical effort. NSF award abstract
When Summer and Fall 2013
Equipment Large Wave Flume
PI

Co-PI(s)
Jennifer Irish, Virginia Tech

Robert Weiss (Virginia Tech)
Title NEESR: Tsunami Run-up and Withdrawal Dynamics on a Sloping Beach with Discontinuous Macro-Roughness (Phase II)
What Tsunamis are a leading natural threat to coastal communities, and events such as the 2011 Japan, 2010 Chile, and 2004 Indian Ocean tsunamis caused widespread, crippling damages to coastal infrastructure. Yet, these events also revealed the role of mangroves and other vegetation as sustainable mitigation against tsunami hazard. The overarching goal of this research is to develop a quantitative understanding of tsunami inundation in regions with coastal forests. This project combines detailed fluid dynamics modeling with physical experiments to study tsunami inundation in the presence of discontinuous coastal forest. Laboratory experiments will be used to study inundation in discontinuous forest, represented by circular patches of cylinder arrays. Measurements will be used to quantify mean flow and turbulence statistics, the spatial flow field between two forest patches, runup speed, and large-scale flow structures during withdrawal. Numerical analysis will be integrated with the experimental campaign to expand the parameter set for analysis and to assess the impact of temporal changes in forest characteristics. NSF award abstract
When Winter 2014
Equipment Tsunami Wave Basin
PI

Co-PI(s)
James Kaihatu, Texas A&M

Alexandru Sheremet (U Florida), Robert Weiss (Virginia Tech)
Title NEESR: Interaction of Tsunamis with Short Waves and Bottom Sediment - Numerical and Physical Modeling (Phase II)
What The interaction between short ocean waves and long transient tsunamis is studied in conjunction with sediment transport process. This is in keeping with the theme of the study of tsunami-generated processes in concert with natural oceanographic processes, and will be done from two viewpoints: that of the tsunami's effect on the transported and reworked sediment bed; and that of the effect of the sediment load on the transporting power of the tsunami. Numerical modeling will form the backbone of this work, with physical modeling providing data for process study, parameterization and validation. A sophisticated model based on smoothed particle hydrodynamics will be tightly integrated into the experimental plan. The first set of experiments at OSU will focus on evaluating the transport power of the tsunami in order to develop the pickup function and other parameterizations for the transport model. The second set of experiments will investigate full bed evolution. In all experiments, forcing will consist of tsunamis and combined tsunami-swell conditions. Measurements will be used to evaluate the dissipation of the tsunami in several different ways. NSF award abstract
When Spring 2014
Equipment Large Wave Flume

Learn more about...
     Past projects
     Electronic Notebook records of projects
     Information for prospective researchers