<div dir="ltr"><br><p class="MsoNormal"><b><span style="font-family:"Times New Roman"">NHERI SimCenter</span></b><span style="font-size:13.5pt;font-family:"Times New Roman"">–</span><b><span style="font-family:"Times New Roman""> Natural
Hazards Engineering 101<br>
Monday, </span></b><b><span style="font-family:"Times New Roman";color:black">June 12, 2017, 11am – 12pm PDT</span></b></p><p class="MsoNormal"><b><span style="font-family:"Times New Roman";color:black"><br></span></b></p>
<p class="MsoNormal"><span class="m_-7423930993738251485m_8827541832442166325gmail-hl-learning"><b><span style="font-family:"Times New Roman"">Overview of Computational Fluid Dynamics, </span></b></span><b><span style="font-family:"Times New Roman"">Simulation & Computational Tools
in Wind Engineering</span></b></p><p class="MsoNormal"><b><span style="font-family:"Times New Roman""><br></span></b></p>
<p class="MsoNormal"><b><span>REGISTER</span></b><span>
for this webinar at<br>
</span><a href="https://www.designsafe-ci.org/learning-center/training/simcenter/webinar-170612/" target="_blank"><span>https://www.designsafe-ci.org/<wbr>learning-center/training/simce<wbr>nter/webinar-170612/</span></a><span></span></p>
<p class="MsoNormal"><span>Connection information will be
distributed upon receipt of registration.<span style="color:rgb(117,117,117)"></span></span></p>
<p class="MsoNormal"><span style="color:rgb(117,117,117)"> </span></p>
<p><b><span>ABSTRACT:</span></b><span>
<br>
<br>
</span>Fluid-structure interactions in wind engineering are complex and
multi-scale with nonlinear interactions among different scales, which preclude
a functional relationship between wind and its effects on built environment.
The presence of atmospheric turbulence with eddies of various sizes contributes
to additional complexity as summarized by Leonardo di ser Piero da Vinci, “…the
smallest eddies are almost numberless, and large things are rotated only by
large eddies and not by the small ones, and small things are turned by small
eddies and large.” In view of these challenges, physical modeling in wind
tunnels have traditionally served as a most reliable source of quantifying wind
load effects. In digital age with burgeoning growth in computational resources
and parallel advances in computational fluid dynamics, computational methods
are evolving with a promise of becoming a most versatile, convenient and
reliable means of assessing wind loads effects. CFD based simulations provide
information non-intrusively on quantities of interest at any location in the
domain, whereas it is limited to only sensor locations in wind tunnels. In
order to realize this potential, assurance of robustness and accuracy of
numerical simulations is critical before the physical simulations in wind
tunnels are relegated to simply validation of final designs. To usher new
advances in the digital domain, the NSF’s NHERI SimCenter is designed to develop
the next-generation of computational modeling and simulation software tools and
web-enabled workflow management frameworks. These would be delivered to the
community of users through Discovery Workspace at the NHERI’s CI Center
DesignSafe.</p>
<p>In this context, the seminar will provide a rudimentary background of
wind-structure interactions. This will be followed by a guided tour of
computational fluid dynamics (CFD) with a focus on wind engineering
applications. The success in numerically capturing the complexity of massively
separated flows around structures compounded by multi-scale fluctuations in the
flow due to turbulence and their nonlinear interactions will be discussed in
light of the three main approaches central to CFD, i.e., RANS, LES and DNS. An
overview of the relative success of CFD in aerospace engineering and the
current state-of-the-art in wind engineering will be presented by delineating
the differences in the approach flow conditions and the streamline nature of
bodies versus bluff profiles. Also, CFD applications that integrate other
emerging computational and machine learning tools will be presented in examples
of shape optimization of structural form, uncertainty quantification and
multi-fidelity modeling will be presented.</p>
<p>Briefly, the presentation will offer a quick overview of a virtual wind
tunnel under development at SimCenter along with a preview of stochastic
simulations and database enabled design will be presented.</p>
<p class="MsoNormal"><b><span style="font-family:"Times New Roman"">PRESENTER:</span></b><span style="font-family:"Times New Roman"">
</span></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman""> </span></p>
<p class="MsoNormal"><b><span style="font-family:"Times New Roman"">Dr. Ahsan Kareem </span></b><span style="font-family:"Times New Roman"">is
the Robert M. Moran Professor of Engineering and the Director of the NatHaz
Modeling Laboratory at the University of Notre Dame. His work focuses on
characterization and formulation of dynamic load effects due to wind, waves and
earthquakes on tall buildings, long span bridges, offshore structures and other
structures via fundamental experimental, laboratory and full-scale measurements
utilizing cyber and cyber-physical infrastructures.<br>
<br>
</span></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman"">He is elected
President of the International Association for Wind Engineering (IAWE). He has
been awarded numerous honors, including the Presidential Young Investigator
Award from the White House Office of Science and Technology. A recipient of
ASCE’s: Theodore von Karman Medal, Masanobu Shinozuka Medal, James Croes Medal,
Robert H. Scanlan Medal and Jack E. Cermak Medal and State-of-the-Art Award,
inducted to the Offshore Technology Conference Hall of Fame and Distinguished
Member of ASCE; Alan G. Davenport Medal of IAWE; Distinguished Research Award
of IASSAR (Int’l Assoc. for Structural. Safety and Reliability); the University
of Notre Dame. He has served as a High-End Foreign Expert at Tongji University
and delivered 2013 Scruton Lecturer at the Institute of Civil Engineers,
London, UK. He has been appointed Honorary Professor at several universities
overseas, serves on the Editorial Board of several international journals and
has recently co-authored two books. He is an elected Member of the US National
Academy of Engineering.</span></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman""> </span></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman""> </span></p>
<p class="MsoNormal"><b><span style="font-family:"Times New Roman"">About
<span>Natural Hazards Engineering 101</span>:</span></b><span style="font-family:"Times New Roman"">
</span></p>
<p class="MsoNormal"><span style="color:rgb(117,117,117)"> </span></p>
<p class="MsoNormal"><span style="font-family:"Times New Roman"">NHE 101 is a
webinar series intended to provide a common knowledge base for the NHERI
community. Webinars will, for each of the primary natural hazards in the NHERI
program, provide an introduction to fundamental concepts and an overview of
experimental- and simulation-based research. Webinars will also provide an
introduction to numerical methods and computational tools used in NHE research.
All are encouraged to participate.</span></p>
</div>