The program will consist of Plenary Sessions and Technical Sessions.
Plenary Sessions Program
Monday 8:00 – 8:20
8:00 – 8:20
Opening Ceremony
CWE2010 Chairmen
Dr. Alan Huber, Symposium Chairman
UNC, Institute for the Environment (USA)
Prof. Ted Stathopoulos, Chairman of the Advisory Committee
Concordia University (Canada)
Dr. Bert Blocken, Chairman of the Scientific Committee
Eindhoven University of Technology (The Netherlands)
CWE2010 Conveners
Prof. Yukio Tamura, President of the International Association of Wind Engineering
Tokyo Polytechnic University (Japan)
Prof. Nick Jones, President of the American Association of Wind Engineers
Johns Hopkins University (USA)
CWE2010 UNC Hosts
Dr. Stanley Ahalt Director, Renaissance Computing Institute (RENCI)
Dr. Lawrence Band Director, UNC Institute for the Environment
Dr. Gavin Smith Director, UNC Center for the Study of Natural Hazards and DisastersCenter for the Study of Natural Hazards and Disasters
8:20 – 8:30
U.S. Congressman David Price
4th District of North Carolina
Chairman, House Appropriations Subcommittee on Homeland Security
Monday 8:20 to 9:50
Plenary Session 1a. Applying Computational Wind Engineering to Practice: Perspectives from the Political, Academic, Corporate and Public Sector Community
Session Chair and Moderator. Dr. Gavin Smith, AICP
Executive Director UNC Center for the Study of Natural Hazards and Disasters.
Department of Homeland Security, Center of Excellence—Natural Disasters, Coastal Infrastructure and Emergency Management (DIEM).
Associate Research Professor Department of City and Regional Planning University of North Carolina at Chapel Hill.
A distinguished panel has been developed to present overviews of client needs and challenge participants in CWE2010
U.S. Congressman David Price
4th District of North Carolina
Chairman, House Appropriations Subcommittee on Homeland Security
Professor Yukio Tamura
Tokyo Polytechnic University, Japan
President, International Association for Wind Engineering (IAWE).
Chairman, International Group for Wind-Related Disaster Risk Reduction (IG-WRDRR).
James A. Rossberg, P.E.
Director, Structural Engineering Institute of the American Society of Civil Engineers
John Gaynor
Office of Policy, Planning, & Evaluation, NOAA Oceanic and Atmospheric Research
Dr. Thomas A. Birkland
William T. Kretzer Professor of Public Policy,
School of Public and International Affairs at North Carolina State University
William L. Coulbourne, P.E.
Director, Wind and Flood Hazard Mitigation, Applied Technology Council
Session Structure:
This plenary session will identify and discuss the pressing research questions that need to be addressed by wind engineers from the “client’s” perspective. These questions will be posed by a panel comprised of congressional, academic, corporate, and public sector officials. Speakers will include representatives from the US Congress, NOAA, professional associations, international officials, and university scholars. There will be an open floor discussion following the speakers.
Goals:
The intent of the panel is to discuss client needs which will help frame future directions for researchers and those that seek to apply this knowledge to practice. Also, this opening session will help guide technical sessions that follow where the comments of participants can be addressed in greater detail.
Monday 9:50 to 10:00
Daily Announcements
Welcome Special Guest: Professor Tanay Uyar
Professor at the Energy Section of Marmara University, Turkey
Vice President the World Wind Energy Association
Monday 10:20 to 11:35
Plenary Session 1b. Topic Session Organized by ASCE Committee on Computer-Aided Wind Engineering: What is the State-of-the-Art for CFD Models and their Role in Wind Engineering?
Chairmen: Dr Gregory Kopp (University of Western Ontario, Canada)
and Dr. Ted Stathopoulos (Concordia University, Canada)
Session Structure:
Chairmen’s Introduction to the Topic and Session
Introduction of Panelists
Presentation by Dr Leighton Cochran (CPP, USA)
Panelist’s Reaction to the Presentation
Questions and Discussion with the Audience
A distinguished panel has been developed to present overviews on the topic, and respond to questions and discussion with the audience. Members of the panel:
Dr. Bert Blocken (recorder)
Eindhoven University of Technology, The Netherlands
Prof. Ian Castro
University of Southampton, UK
Prof. Horia Hangan
The University of Western Ontario, Canada
Prof. Berndt Leitl
University of Hamburg, Germany
Prof. Robert Meroney
Colorado State University, USA
Prof. Yoshihide Tominaga
Niigata Institute of Technology, Japan
Goals:
To generate a lively discussion of what are the capabilities for computational methods, particularly CFD models and their application to wind engineering problems. What works? What doesn’t, and why? For what types of problems may we begin to reliably use CFD models today? What is required to have CFD models that are reliable for other problems? What is required in the CFD model to be good enough and comparable with what may be done using a wind tunnel model in determining building or bridge or environmental aerodynamics? How and when might trends in computing change what may be possible for CFD models in their application in wind engineering. The overall goal of the session is to initiate thoughtful discussions of the topic issues that may continue within all symposium sessions and hallways.
Tuesday 8:10 to 10:10
Plenary Session 2. Trends in High Performance Computing for Wind Engineering
Session Moderator: Dr. Alan Huber, UNC Institute for the Environment, USA
This session will start with a Keynote Speaker to discuss and demonstrate present and future application of high performance computing to wind engineering applications. Then this session will be lead by 3 expert computer scientists from Renaissance Computing Institute and the University of North Carolina at Chapel Hill. The two Discussion periods allow for some open exchange with the audience.
8:10 – 8:40
Keynote Speaker: Professor Tetsuro Tamura
Tokyo Institute of Technology, Japan.
Application of LES-based Model to Wind Engineering - Implementation of Meteorological effects
8:40 - 8:50
Discussion
8:40 - 9:10
Dr. Patrick Dreher presently serves as RENCI’s chief domain scientist focused on distributed computational systems and cloud computing. He is leading efforts to expand and integrate these computational systems with storage and networking to form a coherent cyberinfrastructure that supports the work at RENCI, its engagement sites throughout North Carolina and nationally.
Cloud Computing: Cloud Computing has arrived as a new technology paradigm for computation and storage. This talk will introduce this new distributed IT computation and storage option and give a high level summary as to how and where to best use this technology as part of the mix of resources to support a research program.
9:10-9:30
Dr. Rob Fowler is the Director of High Performance Computing at the RENCI. His primary technical interests in High Performance Computing are in the area of performance measurement and analysis where architectures, operating systems, and compilers interact.
Commodity Multi-Core Computers and Technical Computing: The past few years has seen a radical shift in computer design from ever faster single-threaded processors to highly concurrent multi-core and multi-thread chips. Driven by Moore's law and power considerations, this trend will continue. Meanwhile, the capacity of memory chips continues to grow rapidly, while speed and on-chip concurrency have evolved much more slowly. These trends affect the performance of technical calculations (science and engineering) on recent hardware. There are implications for future computing systems, from the laptop to supercomputers, for technical computing.
9:30-9:50
Dr. Dinesh Manocha is a Distinguished Professor of Computer Science at UNC Chapel Hill. His research group has been working on designing efficient GPU-based algorithms for geometric, scientific and database applications for more than 12 years. Some of the GPU-based utilities developed by his group are widely used in academia and industry.
Achieving High Throughput from GPUs for Scientific Applications: For years the performance and functionality of graphics processors (GPUs) has been increasing at a faster pace than Moore's Law. The latest GPUs consist of more than 3 Billion transistors and can offer a few TFlop of peak performance. They consist of tens and hundreds of cores, offer high memory bandwidth and have different programming model and the underlying architecture. GPUs as many-core accelerators have different applications, including scientific computing, database computations, sorting and geometric algorithms. New methods are being developed that could exploit the architectural features and programming limitations of the GPUs.
9:50 – 10:10
Discussion
Wednesday 8:10 to 10:10
Plenary Session 3. Development, Validation, and Application of Atmospheric Boundary Layer Models and Turbulence Models for CWE
Session Moderator: Dr. Alan Huber, UNC Institute for the Environment, USA
Session Co-chairpersons:
Professor Evgeni Fedorovich: University of Oklahoma, USA
Professor Michael Schatzmann: University of Hamburg, Germany
Professor Ryuichiro Yoshie: Tokyo Polytechnic University, Japan
Two Keynote Speakers will initiate this Plenary Session with talks on lessons learned from example studies. A discussion panel will follow the 2 keynote speakers consisting of the 3 session co-chairs plus:
Professor Fernando Porté-Agel: University of Minnesota, USA
Sukanta Basu: Texas Tech University, USA
Robert Banta: NOAA, USA
8:10 – 8:40
Keynote Speaker: Professor Fernando Porté-Agel
University of Minnesota, USA
Title: A Large-Eddy Simulation Framework for Wind Energy Applications
8:40 – 8:10
Keynote Speaker: Professor Michael Schatzmann
University of Hamburg, Germany
Title: Validation of Urban Flow and Dispersion CFD Models
9:10 – 10:10
Panel Discussion
Chair: Professor Evgeni Fedorovich
Background:
Atmospheric boundary layer and turbulence models are core elements of CFD-CWE model applications. The atmospheric environment significantly influences validation of CFD-CWE model predictions, and the CWD models advance as boundary layer and turbulence models are advanced. Developments in CFD-CWE are possible both with research and advancing capabilities of computing hardware. Advancement in atmospheric boundary layer and turbulence modeling, as a part of CWE, is critical, for example, for assessing high wind loads on structures (buildings, highways, bridges, etc.), wind driven fires, and for wind farm design. In addition, it is generally important for evaluating pedestrian comfort within built open-air environments and venues, and assessment of the transport and diffusion of dust/particles and air pollution in urban areas. For low winds, thermal effects become significant in atmospheric boundary layer flows. Some CWE models have already demonstrated the significant role that heating/cooling of roofs/walls of buildings may play in street canyon flows but further study is needed. It is important to account for temporal and spatial variations of the temperature field in CWE models for realistic reproduction of atmospheric flows. Atmospheric thermal stability and heating/cooling of surfaces exposed to the flow also significantly affect properties of atmospheric turbulence. Increasing/decreasing turbulent fluxes of momentum and heat in turn affect mean flows and diffusion processes. In situations with multiple buildings or for wind farms with multiple wind turbines, it is important to model their interactions. Understanding and adequate modeling of turbulent motion within the atmospheric boundary layer are essential to improve CWE models. Field and laboratory flow measurements are critical for developing and testing numerical models. Therefore, some discussion is needed regarding the best capabilities of wind tunnel measurements and field observations intended for supporting the development of CWE models.
Outcome of the Plenary Session 3 is important for coupling of CWE and meteorological models as will be discussed in Plenary Session 4. Improved CWE models provide realistic simulations under diurnal variations of atmospheric conditions. Plenary Sessions 3 and 4 are complimentary to each other.
Goals:
1. Review the present state-of-art of CFD-CWE use of atmospheric boundary layer models and turbulence models and their future CWE applications.
2. Evaluate modeling capabilities to account for the effects of atmospheric flow nonstationarity and thermal heterogeneity in CWE.
3. Identify requirements for present and future observational and measurement techniques for probing atmospheric flows to support CWE applications.
4. Review validation methods for atmospheric boundary layer models and turbulence models employed in CWE.
Thursday 8:10 to 10:10
Plenary Session 4a. Coupling Computational Wind Engineering and Mesoscale Meteorological Models
Session Moderator: Professor Emeritus Robert Meroney, Colorado State University, USA
Session Co-chairpersons:
Dr. Ted Yamada: YSA Corporation, USA
Professor Akashi Mochida: Tohoku University, Japan
Professor Heinke Schlünzen: University of Hamburg, Germany
Two Keynote Speakers will initiate this Plenary Session. These will be followed by three complementary invited speakers and introduction to the panel. A full panel discussion and exchange with the audience will occur in Plenary Session 4b.
The panel consists of the three Co-chairpersons plus:
Branko Kosovic, National Center for Atmospheric Research, USA
Julie Lundquist, University of Colorado at Boulder, USA
8:10 – 8:40
Keynote Speaker: Professor Akashi Mochida
Tohoku University, Japan
Up-scaling CWE Models to Include Mesoscale Meteorological Influences
8:40 – 9:10
Keynote Speaker: Dr. Ted Yamada
YSA Corporation, USA
Down-scaling Mesoscale Models for Wind Engineering Applications
9:10 - 9:20
Brief Discussion of Keynotes
9:20 – 10:05
Invited Speakers
Branko Kosovic, National Center for Atmospheric Research, USA
Fine-scale atmospheric modeling at NCAR
Julie Lundquist, University of Colorado at Boulder, USA
Nesting large-eddy simulations within mesoscale simulations in
WRF for wind energy applications
Professor Heinke Schlünzen: University of Hamburg, Germany
European Perspective
10:05 – 10:10
Introduction to the Panel Plan for Plenary Session 4b.
Background:
Computational wind engineering (CWE) has expanded its applications: wind load assessments for super high structures (over 1000m), site selections and design of wind farms and solar draft towers, and strategy to mitigate the urban heat island and air quality effects. Studies for these areas are strongly influenced by mesoscale meteorology. An understanding of winds for traditional wind engineering applications need to consider mesoscale meteorology, especially within urban regions, and at minimum needed to support proper boundary conditions for wind engineering applications
On the other hand, horizontal grid spacing of mesoscale models is approaching to less than 10m. For high resolution mesoscale models, the surface boundary conditions such as buildings in the urban areas should be treated realistically. The experiences and knowledge accumulated in CWE should be useful for improving the boundary conditions in the urban areas for mesoscale models.
Several methods have been developed to couple CWE models with mesoscale models. One method is to use mesoscale model results as boundary conditions to CFD models. This is probably the simplest and reasonable approach to implement weather variations into CWE applications.
An alternative approach is down-scaling a mesoscale model to include CWE model capabilities or up-scaling a CWE model to include mesoscale model capabilities. The result is a single model which is used for both CWE and mesoscale applications. This single model approach is attractive since both CWE and mesoscale phenomena are simulated interactively and simultaneously by nesting computational domains.
A third approach is a hybrid of the first and the second approaches discussed above. The number of nesting domains is limited to less than three (3) in a single model and the boundary conditions are provided by a different mesoscale model. In this way, mesoscale variations are reflected into CWE and CWE effects are returned to mesoscale by a two way nesting.
There are some coupled models that are in operational while others are only a prototype. Every model has limitations, however. One of the objectives of the session is to identify and inform the capabilities as well as limitations of each approach to prospect users.
Goals:
There are many similarities but also significant differences between the engineering and meteorological models. The goals of the session are to open the communications between wind engineering and mesoscale modelers to
- understand the differences in purposes and approaches,
- learn the experience and knowledge of others, and
- identify ways to couple computational wind engineering and mesoscale atmospheric models
Thursday 16:00 to 17:00
Plenary Session 4b. Open Discussion between Panel Members and Audience
Session Moderator: Professor Emeritus Robert Meroney, Colorado State University, USA
Panel Members listed in Plenary Session 4a.
Thursday 17:00 to 17:30
Closing Ceremony
