<div dir="ltr"><div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div><div dir="ltr"><br></div></div></div></div></div></div><div class="gmail_quote"><div dir="ltr"><div class="gmail_quote"><div dir="ltr"><div class="gmail_quote"><div dir="ltr" class="gmail_attr">--------- Forwarded message ---------<br>From: <strong class="gmail_sendername" dir="auto">Jose Castillo</strong> <span dir="auto"><<a href="mailto:jcastillo@sdsu.edu" target="_blank">jcastillo@sdsu.edu</a>></span><br>Date: Mon, Aug 5, 2019 at 8:38 AM<br>Subject: Fwd: [CSRC.COLLOQUIUM] "COHERENT FLOW MOTIONS IN TURBULENT BOUNDARY LAYERS"<br>To: Jose Castillo <<a href="mailto:jcastillo@sdsu.edu" target="_blank">jcastillo@sdsu.edu</a>><br></div><br><br><div dir="ltr"><br clear="all"><div class="gmail_quote"><div dir="ltr"><div><div style="overflow:auto"><div style="max-height:10000px"><div dir="ltr"><div><div style="overflow:auto"><div style="max-height:10000px"><div dir="ltr"><div><div style="overflow:auto"><div style="max-height:10000px"><div dir="ltr"><div><div style="overflow:auto"><div style="max-height:10000px"><div dir="ltr"><div><div style="overflow:auto"><div style="max-height:10000px"><div dir="ltr"><p style="text-align:center;clear:both"><a href="https://lh3.googleusercontent.com/-ZPFNPh16sR0/Wt39FrXUP-I/AAAAAAAAAaw/3wQunGe20lUopmV_ggfPaDwE9cVAgVzxgCLcBGAs/s1600/image001.jpg" style="margin-left:1em;margin-right:1em" target="_blank"><img src="https://lh3.googleusercontent.com/-ZPFNPh16sR0/Wt39FrXUP-I/AAAAAAAAAaw/3wQunGe20lUopmV_ggfPaDwE9cVAgVzxgCLcBGAs/s1600/image001.jpg" border="0"></a></p><br>
<p class="MsoNormal" style="text-align:center" align="center"><span style="font-family:"Verdana",sans-serif;color:black">DATE:</span><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"> </span><span style="font-size:13.5pt;font-family:"Verdana",sans-serif;color:black"> </span><b><span style="font-size:18.0pt;font-family:"Verdana",sans-serif">Monday, August 12, 2019</span></b></p>
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<p class="MsoNormal" style="text-align:center" align="center"><span style="font-family:"Verdana",sans-serif;color:black">TITLE:</span><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"> <br></span></p><p class="MsoNormal" style="text-align:center" align="center"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"> <br></span></p><p class="MsoNormal" style="text-align:center" align="center"><font size="6"><span style="font-family:verdana,sans-serif"></span></font></p><p class="MsoNormal" style="text-align:center" align="center"><font size="6"><span style="font-family:verdana,sans-serif"><b><span style="background:white none repeat scroll 0% 0%"></span></b></span></font></p><div style="text-align:center"><span style="font-family:verdana,sans-serif"><font size="6"><b><span></span></b></font></span><span style="font-family:verdana,sans-serif"><font size="6"><b><span></span></b></font></span><span style="font-family:verdana,sans-serif"><font size="6"><b><span></span></b></font></span><span style="font-family:verdana,sans-serif"><font size="6"><b><span></span></b></font></span><span style="font-family:verdana,sans-serif"><font size="6"><b><span></span></b></font></span><span style="font-family:verdana,sans-serif"><font size="6"><b><span></span></b></font></span><span style="font-family:verdana,sans-serif"><font size="6"><b><span></span></b></font></span><span style="font-family:verdana,sans-serif"><font size="6"><b><span></span></b></font></span><span style="font-family:verdana,sans-serif"><font size="6"><b><span></span></b></font></span><span style="font-family:verdana,sans-serif"><font size="6"><b><span> </span></b></font></span><span style="font-family:verdana,sans-serif"><font size="6"><b><span></span></b></font></span><span style="font-family:verdana,sans-serif"><font size="6"><b><span></span></b></font></span><span style="font-family:verdana,sans-serif"><font size="6"><b><span><span>COHERENT FLOW MOTIONS IN TURBULENT BOUNDARY LAYERS</span></span></b></font><br></span><span style="font-family:verdana,sans-serif"><font size="6"><b><span style="font-size:11pt"></span></b> </font></span></div><p class="MsoNormal" style="text-align:center" align="center"><span style="font-family:"Verdana",sans-serif;color:black"></span></p>
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<p class="MsoNormal" style="text-align:center" align="center"><span style="font-family:"Verdana",sans-serif;color:black">LOCATION:</span><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black"> <b> </b></span><b><span style="font-size:18.0pt;font-family:"Verdana",sans-serif">E-203, Engineering Dean's Conference Room<br></span></b></p>
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<p class="MsoNormal" style="text-align:center" align="center"><span style="font-family:"Verdana",sans-serif;color:black">SPEAKER/BIO:</span><span style="font-size:13.5pt;font-family:"Verdana",sans-serif;color:black"> </span><b><span style="font-size:18.0pt;font-family:"Verdana",sans-serif"><br></span></b></p><p class="MsoNormal" style="text-align:center" align="center"><br><b><span style="font-size:18.0pt;font-family:"Verdana",sans-serif"></span></b></p><p class="MsoNormal" style="text-align:center" align="center"><b><span style="font-size:18.0pt;font-family:"Verdana",sans-serif"></span></b><b><span style="font-size:18.0pt;font-family:"Verdana",sans-serif"></span></b><b><span style="font-size:18.0pt;font-family:"Verdana",sans-serif"></span></b><b><span style="font-size:18.0pt;font-family:"Verdana",sans-serif">Christian J. Kähler<br>Institute for Fluid Mechanics and Aerodynamics, Bundeswehr University Munich, Germany<br></span></b><font size="4"><span style="font-family:verdana,sans-serif"><b><span><b><span style="font-size:18.0pt;font-family:"Verdana",sans-serif"><span style="color:black"></span></span></b></span><span></span></b></span></font></p><p class="MsoNormal" style="text-align:center" align="center"><b><span style="font-size:18.0pt;font-family:"Verdana",sans-serif"></span></b></p>
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<p class="MsoNormal"><span style="font-family:"Verdana",sans-serif;color:black"><br></span></p><p class="MsoNormal"><span style="font-family:"Verdana",sans-serif;color:black">ABSTRACT:</span></p><font size="4"><span style="font-family:verdana,sans-serif"><span>Turbulent boundary layers are still the subject of intense scientific investigations and with the increasing strength of numerical and experimental techniques, more features of the turbulent motion can be resolved that enhance our picture of near wall turbulence. Due to the enormous progress in optical field measurement techniques (PIV / PTV), today it is possible to non-intrusively sample the flow, even at high Reynolds numbers, with micron resolution in all three spatial directions. This allows for investigations of the scaling of statistical flow quantities and near wall flow effects, such as the small reverse flow events in the near wall region recently predicted in numerical flow simulations. Moreover, it is possible to record turbulent boundary layer features over a large domain in order to study the coherent large scale flow features, such as turbulent superstructures and their scaling. Within this presentation, the large and small scale features of various high Reynolds number turbulent boundary layer flows will be discussed and the link or interaction between the coherent structures will be illuminated to better understand the puzzle of near wall turbulence and intermittency.</span></span></font></div><div dir="ltr"><font size="4"><span style="font-family:verdana,sans-serif"><br></span></font></div><div dir="ltr"><font size="4"><span style="font-family:verdana,sans-serif">Biography: <br></span></font></div><div dir="ltr"><font size="4"><span style="font-family:verdana,sans-serif">Christian J. Kähler received his Physics Diploma Degree from the Technical University Clausthal in 1997, his PhD in Physics from the Georg August University of Goettingen in 2004 (supervisor Prof. Eckelmann) and his Habilitation from the Technical University in Brunswick in 2008. From 1996 to 2001 Dr. Kaehler worked at the German Aerospace Center (DLR) in Goettingen (Dr. Kompenhans), during which he had research stays at the University of Illinois at Urbana Champaign in 1996 (Prof. Adrian) and at Caltech in 1998 (Prof. Gharib). From 2001 to 2008 he was the head of the research group on Flow Control and Measuring Techniques at the Technical University Brunswick (Prof. Radespiel). He then became Professor for Fluid Dynamics and was appointed director of the Institute of Fluid Mechanics and Aerodynamics of the University at der Bundeswehr Munich in 2008. In 2012, he was offered an Einstein professorship for Aerodynamics at the Technical University Berlin (declined) and in 2017 the Technical University Darmstadt offered him to become head of the chair of Fluid Mechanics (declined).</span></font></div><div dir="ltr"><font size="4"><span style="font-family:verdana,sans-serif"><br></span></font></div><div dir="ltr"><font size="4"><span style="font-family:verdana,sans-serif">His research covers a broad range of topics involving the development of optical measurement techniques on the micro and macro scale in order to further investigate complex phenomenon in microfluidics and turbulent flows at subsonic, transonic, and supersonic conditions. He is an associate editor of Experiments in Fluids (Springer Nature), an editorial advisory board member of Flow, Turbulence and Combustion (Springer Nature) and editorial board member of Theoretical & Applied Mechanics Letters (Elsevier) and a Steering committee member and organizer of the International PIV Challenge (2001 Goettingen, 2003 Busan, 2005 Pasadena, 2014 Lisbon). He was chairman of the International Conference on Experimental Fluid Mechanics 2018 and organizer of the International Symposium on Particle Image Velocimetry in 2019. He has given over 20 keynote and named lectures and more than 80 additional invited lectures. He has authored and co-authored over 100 archival publications and 200 conference papers. Furthermore, he is co-author of the 3rd edition of the Springer book on Particle Image Velocimetry.<br></span></font></div><div dir="ltr"><font size="4"><span style="font-family:verdana,sans-serif"><br></span></font></div><div dir="ltr"><font size="2"><span style="font-family:verdana,sans-serif"><span style="font-family:"Verdana",sans-serif;color:black"></span></span></font></div><br><div dir="ltr"><br><font size="4"><span style="font-family:verdana,sans-serif"></span><span style="font-family:verdana,sans-serif"></span></font></div><div dir="ltr"><font size="4"><span style="font-family:verdana,sans-serif">Host: Xiaofeng Liu, Aerospace Engineering</span></font></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div>
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