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SUNMONTUEWEDTHUFRISAT
Conferences, Lectures, & Seminars
Events for October
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AME Seminar
Wed, Oct 06, 2021 @ 03:30 PM - 04:30 PM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
Speaker: Diego Donzis, TAMU
Talk Title: Rethinking Compressible Turbulence: From New Regimes to Extreme Simulations
Abstract: Compressible turbulence is much more common than incompressible turbulence and plays a critical role in countless natural and engineering systems such as astrophysical flows, high-speed aerodynamics, turbulent combustion, among many others. However, much less is known about compressible turbulence due to its larger parameter space; the additional complexity associated with coupling between hydrodynamics and thermodynamics; and the greater challenges to develop theory, attain realistic conditions in simulations, and conduct carefully controlled experiments.
In the first part of this talk I will review recent work that highlights some qualitative differences observed in compressible turbulence using a massive database of very well-resolved direct numerical simulations. After some illustrations of specific compressibility effects on turbulent flows, I will show why current approaches as "corrections" to well-known laws in incompressible turbulence present fundamental problems and then `provide a new alternative interpretation of statistical equilibria in an expanded parameter space in which new compressible universal scaling laws can be found. In the second this part, I will present current computational challenges to achieve more realistic conditions and a novel numerical approach in which the main well-known obstacles towards simulations on exascale systems and beyond can be removed. We will present some examples for smooth flows as well as flows with shocks and reactions.
Biography: Diego A. Donzis is an associate professor and Director of Graduate Programs in the Department of Aerospace Engineering at Texas A&M University where he directs the Turbulence and Advanced Computations Lab (TACL). He received his PhD from the Georgia Institute of Technology and continued his research at the University of Maryland and the International Centre for Theoretical Physics, Italy. His main interests are in high-performance computing at extreme scales, and the physics of turbulence and turbulent mixing in incompressible and compressible flows. Among his major recognitions Dr. Donzis received an NSF CAREER award, the Francois Frenkiel Award from the American Physical Society, TAMU Dean of Engineering Excellence Award, three TEES Faculty Awards for research, the McElmurry Teaching Excellence Award, and is a best graduate from Argentina by the National Academy of Engineering. In 2018, he was named a Presidential Impact Fellow by Texas A&M University for his scholarly influence. He is an AIAA Associate Fellow.
Host: AME Department
More Info: https://usc.zoom.us/j/97427241653?pwd=UGd2aXY2b3dsQkxMdzdvcnNBMjRJZz09
Webcast: https://usc.zoom.us/j/97427241653?pwd=UGd2aXY2b3dsQkxMdzdvcnNBMjRJZz09Location: Seaver Science Library (SSL) - 202
WebCast Link: https://usc.zoom.us/j/97427241653?pwd=UGd2aXY2b3dsQkxMdzdvcnNBMjRJZz09
Audiences: Everyone Is Invited
Contact: Tessa Yao
Event Link: https://usc.zoom.us/j/97427241653?pwd=UGd2aXY2b3dsQkxMdzdvcnNBMjRJZz09
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
AME Seminar
Wed, Oct 13, 2021 @ 03:30 PM - 04:30 PM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
Speaker: Ann Karagozian, UCLA
Talk Title: Dynamics of Acoustically Coupled Combustion Instabilities
Abstract: Acoustically-coupled combustion instabilities can result in large scale, potentially catastrophic pressure oscillations in aerospace propulsion systems, including liquid rocket engines (LREs) and gas turbine engines. A fundamental understanding of the interactions among flow and flame hydrodynamics, acoustics, and reaction kinetics is essential to determining combustor stability and controlling combustion processes. Over the past several years our group at the UCLA Energy and Propulsion Research Laboratory has been pursuing fundamental experiments that can shed light on combustion instabilities and their control, including exploration of the effects of external acoustic perturbations on liquid nanofuel combustion as well as gas-phase fuel jet combustion for alternative geometrical configurations. The dynamics of phenomena such as periodic liftoff and reattachment, periodic partial extinction and reignition, and full extinction are explored and quantified via phase-locked OH* chemiluminescence and high speed visible imaging. Proper orthogonal decomposition (POD) modes and phase portraits extracted from time-resolved imaging enables characterization of characteristic signatures associated with different phenomena. Understanding such signatures enables development of reduced order models that can impact eventual combustion control strategies.
Biography: Ann Karagozian is a Distinguished Professor in the Department of Mechanical and Aerospace Engineering at UCLA and heads the UCLA Energy and Propulsion Research Laboratory and the UCLA-Air Force Research Laboratory Collaborative Center for Aerospace Sciences. Her research interests lie in fluid mechanics and combustion as applied to improved energy efficiency, reduced emissions, and advanced air breathing and rocket propulsion systems. Professor Karagozian was a member of the Air Force Scientific Advisory Board for over 15 years, serving as SAB Vice Chair from 2005-2009 and twice receiving the Air Force Decoration for Exceptional Civilian Service. She is a Member of the National Academy of Engineering and is a Fellow of the American Institute of Aeronautics and Astronautics (AIAA), the American Physical Society (APS), and the American Society of Mechanical Engineers (ASME). She received her B.S. in Engineering from UCLA and her M.S. and Ph.D. in Mechanical Engineering from the California Institute of Technology. She is a member of the Board of Trustees of the Institute for Defense Analyses (IDA) and is an alumna of and mentor for the IDA Defense Science Study Group. Prof. Karagozian also recently became the Inaugural Director of The Promise Armenian Institute, an endowed scholarly and cross-disciplinary outreach entity at UCLA.
Host: AME Department
More Info: https://usc.zoom.us/j/97427241653?pwd=UGd2aXY2b3dsQkxMdzdvcnNBMjRJZz09
Webcast: https://usc.zoom.us/j/97427241653?pwd=UGd2aXY2b3dsQkxMdzdvcnNBMjRJZz09Location: Seaver Science Library (SSL) - 202
WebCast Link: https://usc.zoom.us/j/97427241653?pwd=UGd2aXY2b3dsQkxMdzdvcnNBMjRJZz09
Audiences: Everyone Is Invited
Contact: Tessa Yao
Event Link: https://usc.zoom.us/j/97427241653?pwd=UGd2aXY2b3dsQkxMdzdvcnNBMjRJZz09
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
Advanced Manufacturing Seminar
Fri, Oct 15, 2021 @ 10:00 AM - 11:30 AM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
Speaker: Dr. Conrad S. Tucker, Carnegie Mellon University
Talk Title: Artificial Intelligence and its Impact on Engineering Design and Manufacturing
Abstract:
Our research employs artificial intelligence techniques that seek to automate the main time/cost drivers of the engineering design and manufacturing process. The features of a product inform the form, function and behavior of the resulting design concept that can be subsequently created using traditional manufacturing/additive manufacturing methods. While there exists a wide range of computer aided design tools that seek to generate 3D design concepts, they are primarily parametric in nature and rely extensively on designers expertise, which may not always be readily available. Grants from the National Science Foundation (NSF) and the Defense Advanced Research Projects Agency (DARPA) have enabled our research team to explore the use of Deep Generative Design methods such as Generative Adversarial Networks (GANs) to generate 3D representations of design concepts. However, there is more to a design than simply its 3D form, as the design must perform a function and operate in an environment where its behavior may/may not perform as intended. Towards this end, our research group has proposed liking the AI-generation of a design, with the automatic evaluation of its function and behavior using physics-based simulation engines. The end result is a physics-informed design that has the potential to be realized through techniques such as additive manufacturing.
Biography: Dr. Conrad Tucker is an Arthur Hamerschlag Career Development Professor of Mechanical Engineering and Machine Learning (Courtesy) at Carnegie Mellon University. His research focuses on the design and optimization of systems through the acquisition, integration and mining of large scale, disparate data. Dr. Tucker has served as PI/Co-PI on federally/non-federally funded grants from the National Science Foundation (NSF), the Air Force Office of Scientific Research (AFOSR), the Defense Advanced Research Projects Agency (DARPA), the Army Research Laboratory (ARL), the Office of Naval Research (ONR) via the NSF Center for eDesign, and the Bill and Melinda Gates Foundation (BMGF). In February 2016, he was invited by National Academy of Engineering (NAE) President Dr. Dan Mote, to serve as a member of the Advisory Committee for the NAE Frontiers of Engineering Education (FOEE) Symposium. He received his Ph.D., M.S. (Industrial Engineering), and MBA degrees from the University of Illinois at
Urbana-Champaign, and his B.S. in Mechanical Engineering from Rose-Hulman Institute of Technology.
Host: Center for Advanced Manufacturing
More Info: https://usc.zoom.us/webinar/register/WN_2SihJZ6mR2up1sSa4u_3Jg
Webcast: Registration Link: https://usc.zoom.us/webinar/register/WN_2SihJZ6mR2up1sSa4u_3JgLocation: Online event
WebCast Link: Registration Link: https://usc.zoom.us/webinar/register/WN_2SihJZ6mR2up1sSa4u_3Jg
Audiences: Everyone Is Invited
Contact: Tessa Yao
Event Link: https://usc.zoom.us/webinar/register/WN_2SihJZ6mR2up1sSa4u_3Jg
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
AME Seminar
Wed, Oct 20, 2021 @ 03:30 PM - 04:30 PM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
Speaker: Alban Sauret, UCSB
Talk Title: Capillary Flows of Suspensions
Abstract: Interfacial flows of multiphase systems containing a dispersed solid or liquid phase occur in a broad range of manufacturing, environmental, and bioengineering processes. However, the classical capillary dynamics is strongly modified when the length scale of the liquid becomes comparable to the particle size. This configuration may lead to a failure of classical models based on a rheological approach. For instance, particles can destabilize thin-films, lead to defects in additive manufacturing, reduce transport efficiency, and result in the contamination of substrates.
In this talk, I will present some of our recent studies that characterize the role of interfaces in suspension dynamics. I will first describe the formation of a thin-film of suspension on a substrate to illustrate how the particles are entrained and deposited depending on the flow configuration and suspension properties. I will discuss how these results can be used to develop passive capillary filtering and sorting mechanisms. The second part of the talk will characterize how particles can modify the formation of droplets and the atomization of suspension sheets and ligaments. Our approach, bridging different length and time scales, describes how the bulk behavior and local heterogeneities contribute to the dynamics of multiphase capillary objects.
Biography: Alban Sauret is an Assistant Professor in the Department of Mechanical Engineering at UC Santa Barbara. He graduated with a BS and an MS in Physics from ENS Lyon (France) and earned a Ph.D. in Mechanical Engineering from the University of Aix-Marseille (France) in 2013. During his graduate studies, he was awarded a Geophysical Fluid Dynamics Fellowship from the Woods Hole Oceanographic Institution. He then worked as a Postdoctoral Fellow at Princeton University from 2013 to 2014 and then spent four years as a tenured CNRS Research Scientist in a joint academic and industrial laboratory, while also being a visiting research scholar at NYU Tandon School of Engineering. He joined UC Santa Barbara in 2018. His research aims at understanding the dynamics of multiphase systems. He is particularly interested in the couplings between the fluid dynamics, interfacial effects, and particle transport mechanisms involved in environmental and industrial processes. Alban Sauret was named a Soft Matter Emerging Investigators in 2017, was elected a UC Regents Junior Faculty Fellow in 2019, and received the NSF CAREER Award in 2020. His past results were highlighted in various media, including the Los Angeles Times, The Wall Street Journal, and Science Friday.
Host: AME Department
More Info: https://usc.zoom.us/j/97427241653?pwd=UGd2aXY2b3dsQkxMdzdvcnNBMjRJZz09
Webcast: https://usc.zoom.us/j/97427241653?pwd=UGd2aXY2b3dsQkxMdzdvcnNBMjRJZz09Location: Seaver Science Library (SSL) - 202
WebCast Link: https://usc.zoom.us/j/97427241653?pwd=UGd2aXY2b3dsQkxMdzdvcnNBMjRJZz09
Audiences: Everyone Is Invited
Contact: Tessa Yao
Event Link: https://usc.zoom.us/j/97427241653?pwd=UGd2aXY2b3dsQkxMdzdvcnNBMjRJZz09
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
AME Seminar
Wed, Oct 27, 2021 @ 03:30 PM - 04:30 PM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
Speaker: Paul Ronney, USC
Talk Title: Releasing Insights from Data: Quarrying vs. Sculpting
Abstract: When Michelangelo surveyed a block of marble he saw a figure trapped inside; his goal was to release the figure that in his mind was already there. Research involves not only quarrying (obtaining) blocks of experimental, computational or theoretical data but more importantly releasing the insights trapped within. For example, every student of physics learns about the H atom spectrum - but why this block of data? Because, trapped within the spectrum is a critical, unequivocal insight - that energy levels of matter are quantized.
In that famous example the insight and its significance are obvious given the benefit of years of hindsight - but what important insights are trapped inside freshly-quarried data? The focus of this presentation is on examples of and methods for sculpting data into works of insight. Starting with the aforementioned case study and others the audiences sculpting skill will be challenged with case studies from both the presenters own work (some not yet published) and elsewhere, with an emphasis on examples where the insights were both difficult to sculpt and led to counterintuitive insights.
Biography: Paul Ronney is a Professor in the Department of Aerospace and Mechanical Engineering at the University of Southern California in Los Angeles, CA. Prof. Ronney received a Bachelor of Science degree in Mechanical Engineering from the University of California, Berkeley, a Master of Science degree in Aeronautics from the California Institute of Technology, and a Doctor of Science degree in Aeronautics and Astronautics from the Massachusetts Institute of Technology. He held postdoctoral appointments at the NASA Lewis (now Glenn) Research Center and the Laboratory for Computational Physics at the U. S. Naval Research Laboratory and a position as Assistant Professor in the Department of Mechanical and Aerospace Engineering at Princeton University before assuming his current position at USC. Prof. Ronney was the Payload Specialist Astronaut (Alternate) for Space Shuttle mission MSL-1 (STS-83, April 4 - 8, 1997) and the reflight of this mission (STS-94, July 1 - 16, 1997).
Professor Ronney has extensive research experience in small-scale combustion and power generation, turbulent combustion, flame ignition by transient plasma discharges, micro-scale combustion, bioengineering (robotic insect propulsion), edge flames, flame propagation in confined geometries (Hele-Shaw cells), internal combustion engines, premixed-gas combustion at microgravity and flame spread over solid fuel beds. One of his experiments, a study of premixed-gas flames at low gravity, flew on three Space Shuttle missions.
Prof. Ronney has published over 80 technical papers in peer-reviewed journals, made over 250 technical presentations (including over 35 invited presentations at international conferences), holds 7 U.S. patents, and has received over $12 million in funding for his research projects. In recognition of his achievements, he is a Fellow of the American Society of Mechanical Engineers and the Combustion Institute, an Associate Fellow of the American Institute of Aeronautics and Astronautics, and is a recipient of the National Science Foundation Presidential Young Investigator Award. He has received the Distinguished Paper Award from the Combustion Institute (for a work published in the Proceedings of the Combustion Institute, Vol. 37) and the Starley Premium Award of the Institution of Mechanical Engineers (for the best paper of the year published in the Journal of Automobile Engineering.)
Host: AME Department
More Info: https://usc.zoom.us/j/97427241653?pwd=UGd2aXY2b3dsQkxMdzdvcnNBMjRJZz09
Webcast: https://usc.zoom.us/j/97427241653?pwd=UGd2aXY2b3dsQkxMdzdvcnNBMjRJZz09Location: Seaver Science Library (SSL) - 202
WebCast Link: https://usc.zoom.us/j/97427241653?pwd=UGd2aXY2b3dsQkxMdzdvcnNBMjRJZz09
Audiences: Everyone Is Invited
Contact: Tessa Yao
Event Link: https://usc.zoom.us/j/97427241653?pwd=UGd2aXY2b3dsQkxMdzdvcnNBMjRJZz09
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
Advanced Manufacturing Seminar
Thu, Oct 28, 2021 @ 12:00 PM - 01:30 PM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
Speaker: Dr. Charlie C. L. Wang, University of Manchester
Talk Title: Multi-Axis Additive Manufacturing: Support-Free, Mechanical Strength and Motion Planning
Abstract: In this talk, I will present our recent work related to multi-axis additive manufacturing (i.e., MAAM). Although called 3D printing, the processing of material accumulation in most commercial AM systems is however taken in a 2.5D manner, which leads to two major problems - 1) supporting structures are needed below regions with large overhang and 2) weak mechanical strength between layers of accumulated materials. Both challenges are tackled in our work by incorporating multi-axis motion into the material deposition process. Printing along real 3D tool-paths is conducted. Automatic tool-path planning for multi-axis 3D printing is based on two successive decompositions, first volume-to-surfaces and then surfaces-to-curves. Two computational pipelines will be introduced, where the first one is based on voxel representation for support-free 3D printing and the second paradigm is based on vector-field computation for reinforcing the mechanical strength of 3D printed models. Lastly, I will present methods for effectively planning the motion trajectory of robots in these manufacturing tasks, the tool-paths of which are usually complex and have a large number of discrete-time constraints as waypoints.
Biography:
Prof. Charlie C. L. Wang currently holds a Chair of Smart Manufacturing with the University of Manchester. Prior to this, he was a Chair of Advanced Manufacturing at Delft University of Technology and a Professor of Mechanical and Automation Engineering at the Chinese University of Hong Kong. He also worked as a visiting professor at University of Southern California during sabbatical leave in 2011. Prof. Wang received a few awards from professional societies including the ASME CIE Excellence in Research Award (2016), the ISSMO/Springer Prize (2019), the Best Paper Award (2nd Place) of Solid and Physical Modeling (2019), the NAMRI/SME Outstanding Paper Award (2013), the Best Paper Awards of ASME CIE Conferences (twice in 2008 and 2001 respectively), the Prakash Krishnaswami CAPPD Best Paper Award of ASME CIE Conference (2011), and the ASME CIE Young Engineer Award (2009). He received his B.Eng. degree (1998) in mechatronics engineering from Huazhong University of Science and Technology and his Ph.D. degree (2002) in mechanical engineering from Hong Kong University of Science and Technology (HKUST). He is a Fellow of American Society of Mechanical Engineers (ASME), and is also currently the chair of Solid Modeling Association (SMA).
Host: Center for Advanced Manufacturing
More Info: Registration Link: https://usc.zoom.us/webinar/register/WN_I4t2NMfJS--fyzciHcbzlQ
Audiences: Everyone Is Invited
Contact: Tessa Yao
Event Link: Registration Link: https://usc.zoom.us/webinar/register/WN_I4t2NMfJS--fyzciHcbzlQ
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor.
