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Computational Hydraulics Laboratory

Joannes Westerink

Description

We develop accurate, efficient, robust and usable high performance computational models of coastal ocean hydrodynamics and transport that can be applied to real engineering problems. We focus on developing and analyzing the computational algorithms, on high performance coding that is scalable on tens of thousands of computational cores, on verfication, validation and uncertainty quantification, and on transitioning our state of the art codes to user communities where they are applied to solve a wide array of problems.

Problems we are working on

Our computational models compute water surface elevations, currents and transport of heat, salinity, pollutants and sediment within ocean basins, the continental shelf, estuaries, inlets, rivers, channels and the adjacent floodplains.
These computational models evaluate and design for :
     - Coastal flooding due to hurricanes
     - Currents for shipping operations, dredging, and harbor design
     - Shoreline erosion/accretion and coastal morphology
     - Sewage and waste heat disposal
     - Water resources management – fisheries management

Our codes and models are widely applied for nalysis, design, and risk assessment in the coastal zone. The recent U.S. Army Corps of Engineers 15 billion dollar rebuild of the Hurricane Risk Mitigation system (levees, gate closures, and pump houses) in New Orleans as well as the FEMA FIRMS (Flood Insurance Rate Maps) in Louisiana and Texas are based on our models. NOAA uses our codes and models for operational forecasts of tides and extratropical storm surge along the east coast and uses our codes for tidal analyses in their vdatum vertical referencing projects.  We have or are develping tide, storm surge and wind wave models of the Hawaiian Islands, Puerto Rico, the South China Sea, New York and Long Island, and Alaska.

Our focus is on the ADCIRC community coastal ocean model. ADCIRC represents the multi-scale, multi-process physics, and multi-algorithmic model of the coastal environment and:
     - Incorporates many processes including riverine flows, tides, wind,
       atmospheric pressure, wind waves, rainfall and hydrologic runoff, and
       sediment transport
     - Defines the physical system as it is observed using highly unstructured meshes
     - Numerically resolves the physical system and the energetic scales of motion
     - Applies correct boundary conditions
     - Applies accurate non-diffusive discretization algorithms

We are working on high performance multi-physics couplings to processes such as waves (coupling to WAM, STWAVE, SWAN, and WAVEWATCH III), rainfall runoff processes, as well as morphology in high energy storm environments.

Facilities

Athos High Performance Compute Cluster: 1008 core Nehalem cluster with quad speed infiniband based on 84 HP SL160Z servers each w/ 2 Intel Xeon 5650 hex-core processors

Zas High Performance Compute Cluster: 528 core Opteron cluster with dual speed infiniband (DDR) based on Sun Fire Dual Opteron Quad Core with Infiniband Compute Cluster

RAID Servers: Sun X4500 "Thumper" Dual dualcore Opteron processors - 16 GB total RAM 48 x 750 GB disks - 19 TB usable. 2 x HP DL180 G6 with Dual Quad-Core Intel Nehalem processors - 64 Gb total RAM, 14 x 2 TB disks - 22 TB usable total (tethys mirrors oceanus).

Workstations: Fifteen high performance workstations running Windows 7 or Ubuntu with dual 23” monitors  and Nehalem Core i7, 12-16 GB  DDR3 RAM, Nvidia or Radeon high performance graphics cards, 1-3 TB storage.

Workstation Software: Surface Modeling System (SMS), ArcGIS, Global Mapper, Fugawi Electronic NOAA Bathymetric Charts, USA Photomaps, Google Earth Pro, Corpscon, Fortran 90, C++, Matlab, Mathematica, GMT, Image Magick

Projects

Storm Surge Model Development and Applications for Southern Louisiana and Mississippi
Storm Surge Model Development and Applications for Texas
Collaborative Research: NSF PetaApps Storm Surge Modeling on Petascale Computers
Air-Sea Interaction and Flow Resistance, Wave-Current and Vegetation Effects for Hurricane Storm Surge Computation
Riverine Flows, Tides and Surge in the Lower Mississippi River and Delta and Atchafalaya River and Delta
Hurricane Inundation Risk in the North Pacific Ocean
Supplemental Funding Request for the Application of the ADCIRC Coastal Circulation Model for Predicting Near Shore and Inner Shore Transport of Oil from the Horizon Oil Spill
Extension of the ADCIRC Coastal Circulation Model for Predicting Near Shore and Inner Shore Transport of Oil from the Horizon Oil Spill
Combined Wind Wave, Surge, and Rainfall Runoff Processes in Evaluating Coastal and Inland Inundation
Super-Regional Testbed to Improve Models of Environmental Processes on the U.S. Atlantic and Gulf of Mexico Coasts - Total Water Level and Inundation Component
CMG Collaborative Research: Adaptive Numerical Methods for Shallow Water Circulation with Applications to Hurricane Storm Surge Modeling
Wave and Circulation Prediction on Unstructured Grids

For more information visit coast.nd.edu