[LA-SiGMA-gpu] Fwd: [Allcct] REMINDER: Joannes Westerink Lecture TODAY at 3:30PM

[Zhifeng Yun]

All,

Please consider to attend this seminar.

Zhifeng

-------- Original Message --------
Subject: 	[Allcct] REMINDER: Joannes Westerink Lecture TODAY at 3:30PM
Date: 	Thu, 31 May 2012 07:47:19 -0500
From: 	Susie McGlone <susie at cct.lsu.edu>
To: 	allcct at cct.lsu.edu



CCT Special Guest Lecture Series

High Performance Scalable Computations of Hurricane Driven Wind Waves, 
Storm Surge, and Flow in Integrated Ocean Basin to Shelf to Inland 
Floodplain Systems

Speaker:  Joannes J. Westerink, University of Notre Dame

Date:  May 31, 2012  3:30PM

Place:  338 Johnston Hall

Abstract

Hurricane wind wave, storm surge, and current environments in the 
coastal ocean and adjacent coastal floodplain are characterized by their 
high energy and by their spatial variability. These processes impact 
offshore energy assets, navigation, ports and harbors, deltas, wetlands, 
and coastal communities. The potential for an enormous catastrophic 
impact in terms of loss of life and economic losses is substantial.

Computational models for wind waves and storm driven currents and surge 
must provide a high level of grid resolution, fully couple the energetic 
processes, and perform quickly for risk assessment, flood mitigation 
system design, and forecasting purposes. In order to accomplish this, 
high performance scalable codes are essential. To this end, we have 
developed an MPI based domain decomposed unstructured grid framework 
that minimizes global communications, efficiently handles localized 
sub-domain to sub-domain communication, applies a local inter-model 
paradigm with all model to model communications being kept on identical 
cores for sub-domains, and carefully manages output by assigning 
specialized cores for this purpose. Continuous Galerkin and 
Discontinuous Galerkin implementations are examined. Performance of 
explicit and implicit implementations of the wave-current coupled system 
on up to 32,000 cores for various platforms is evaluated.

The system has been extensively validated with an ever increasing amount 
of wave, water level and current data that has being collected for 
recent storms including Hurricanes Katrina (2005), Rita (2005), Gustav 
(2008), and Ike (2008).  The modeling system helps understand the 
physics of hurricane storm surges including processes such as 
geostrophically driven forerunner, shelf waves that propagate far away 
from the storm, wind wave -- surge interaction, surge capture and 
propagation by protruding deltaic river systems, and frictionally 
controlled inland penetration.

These models are being applied in the development of the hurricane risk 
reduction (formerly known as the hurricane protection) system in 
Southern Louisiana as well as for the development of FEMA Digital Flood 
Insurance Rate Maps (DFIRMS) for Texas, Louisiana, Mississippi, and 
other Gulf and Atlantic coast states.

Bio

Joannes Westerink is the Notre Dame Chair in Computational Hydraulics 
and the Henry J. Massman Chairman of the Department of Civil Engineering 
and Geological Sciences. He holds concurrent appointments in the 
Department of Applied and Computational Mathematics and Statistics and 
the Department of Computer Science and Engineering.  He obtained his 
B.S. and M.S. degrees in Civil Engineering at the State University of 
New York at Buffalo and Ph.D. degree in Civil Engineering from the 
Massachusetts Institute of Technology. Westerink's research focuses on 
the development, analysis and application of coastal ocean and estuarine 
hydrodynamic, constituent transport and sediment transport models. This 
encompasses the multi-component multi-scale physics of these systems, 
particularly the linkages to weather and wind wave models; the 
underlying discretization algorithms; the discrete meshes; the 
development of high performance codes in vector and parallel computing 
environments; the verification, validation and uncertainty 
quantification of codes applied to oceans, continental shelf regions, 
estuaries, rivers, coastal flood plains and lakes. Westerink's models 
are extensively applied by the U.S. Army Corps of Engineers and FEMA to 
design levees and evaluate hurricane risk in the U.S. Gulf and East 
coasts. NOAA applies the models both to analyze tides as well as in 
storm forecasting systems. Westerink was a co-lead in the U.S. Army's 
post Hurricane Katrina IPET Investigation and led the post Katrina storm 
surge model development efforts for the Corps and FEMA. He also serves 
as a commissioner on the Southeast Louisiana Flood Protection 
Authority-West and as an International Expert for the UNESCO Joint World 
Meteorological Organization -- Intergovernmental Oceanographic 
Commission (WMO-IOC) Technical Commission for Oceanography and Marine 
Meteorology (JCOMM) on Enhancing Forecasting Capabilities for North 
Indian Ocean Storm Surges.

For more information: 
http://www.cct.lsu.edu/lectures/high-performance-scalable-computations-hurricane-driven-wind-waves-storm-surge-and-flow-int


-- 
Susie McGlone
Visitor Program Coordinator
LSU Center for Computation and Technology
216 Johnston Hall
Baton Rouge, LA 70803
Phone:  225-578-7340
Fax:  225-578-8902

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