Hyejin Oh

Take a deep dive into fluid dynamics with "Advanced Fluid Mechanics 2" – an online course from the MIT Department of Mechanical Engineering (MechE). You’ll learn about viscous flows and how to apply Navier-Stokes equations to real-world scenarios in hydraulics, aerodynamics and more. Open now, self-paced. Enroll at https://bit.ly/3wqVvrB #FluidMechanics #Engineering #OnlineCourses

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In today’s #SimulationFriday video, courtesy of Dr. Sinan Demir and Dr. Pinaki Pal from Argonne National Laboratory, CONVERGE was used to perform large eddy simulations (LES) of methane-oxygen combustion in a full-scale rotating detonation rocket engine (RDRE). Fuel and air enter the bottom of the RDRE chamber through separate discrete injectors, initiating multiple reaction waves. The video also shows the unrolled mid-plane of the RDRE chamber, which displays the quasi-steady-state behavior with sustained propagation of three quasi-detonation waves. CONVERGE’s SAGE detailed chemistry solver accurately captured the complex chemical reactions occurring during detonation in addition to the combustion processes inside the engine. Our Adaptive Mesh Refinement accommodates the complex movement of the combustor for computationally efficient CFD simulations of RDREs. Interested in learning more about how CONVERGE can simulate rotating detonation engines (RDEs)? Attend our May 15 webinar! https://lnkd.in/dyFMJT4F #CONVERGECFD #CFD #fluiddynamics

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In the realm of engineering, some systems are deemed so complex that traditional methods of #simulation fall short. Often, teams resort to the age-old approach of "build and break" to tackle intricate challenges. However, as our understanding of complex physics evolves, so must our tools. Today, we propose a more streamlined solution to these design conundrums, showcasing the power of simulation in achieving unparalleled accuracy, as well as significant time and cost savings compared to traditional methods. Creating an optical system for high-speed aircraft or reentry vehicles demands meticulous consideration of numerous variables. The mission parameters dictate the atmospheric strata layer flown, influencing the composition of gases encountered. The velocity and gas species, in turn, dictate temperature changes within the vehicle and surrounding gas mixture. Turbulent flow, influenced by varying pressure and temperature, alters the gas's index of refraction. At high speeds, this can trigger phenomena like molecular separation or plasmatic effects, posing unique challenges for optical system design. Moreover, friction generated by the earth's atmosphere heats the vehicle, leading to asymmetrical temperature variations in optical elements and changes in their refractive indices. Internal mounts within the vehicle also experience heating, resulting in thermal expansion and structural deformation of optical elements. If the optical system is infrared-based, components radiating absorbed energy can induce the narcissus effect, where they function as a source of unwanted light within the system. Navigating these complexities might seem daunting, but with advanced simulation tools, it becomes a manageable feat. By digitally modeling and analyzing each facet of the system's behavior, engineers gain insights into its performance under various conditions. This approach not only ensures accuracy but also allows for iterative refinement without the need for physical prototypes. Read our latest white paper, Mission-driven Optical Simulation of Thermal, Structural, and Turbulent Flow, by Ansys Lead Application Engineer Steven LaCava to learn how, simulation offers a transformative paradigm shift in tackling complex design challenges empowering engineers to navigate intricate physics with precision, efficiency, and cost-effectiveness. https://ansys.me/44GimvO Want to learn even more? Join us for Simulation World this week where Steven will be presenting on this very subject! Register today. https://ansys.me/3JZpxWu #SimulationWorld #AnsysOptics #Innovation

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While there is no comparison in computational efficiency between #CPU and #GPU, a long-standing question has been how GPU solvers perform in #benchmarks. According to a recent update, ANSYS has validated its Fluent GPU solver for unsteady laminar flows over a sphere at a Reynolds number of 1000 and found that the simulation-based drag coefficient correlates within 3% of experimental results. For more details, visit this white paper. https://lnkd.in/gBv6CsUg Initially, there was a benchmark for steady-state laminar flow at a Reynolds number of 100, which showed very close correlation. ANSYS has now advanced by validating the solver for unsteady laminar flows at a high Reynolds number. This is a significant milestone, as it builds confidence in the solver's capabilities and supports further development to handle more complex flows. The speed of the Fluent GPU solver, especially for complex flow scenarios, is astonishing. Refer to this webinar https://lnkd.in/gEN5yNEr for more information. Exciting times ahead! #ANSYS #CADFEM #FLUENT #GPU

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📢 MDPI Applied Sciences MDPI #2022BestPaperAward ✨We are pleased to announce the winners of the 2022 Best Paper Award. Five reviews: 1. A Review on Vibration-Based Condition Monitoring of Rotating Machinery https://lnkd.in/gmWApGZ7 2. The Role of Plant Growth-Promoting Rhizobacteria (PGPR) in Mitigating Plant’s Environmental Stresses https://lnkd.in/gbMPkpR3 3. Advances, Applications, and Comparison of Thermal (Pasteurization, Sterilization, and Aseptic Packaging) against Non-Thermal (Ultrasounds, UV Radiation, Ozonation, High Hydrostatic Pressure) Technologies in Food Processing https://lnkd.in/gTQKeSYb 4. A Deep Learning Approach for Sentiment Analysis of COVID-19 Reviews https://lnkd.in/gsp8kqXA 5. A Comprehensive Review of Deep Learning-Based Crack Detection Approaches https://lnkd.in/g7C_4jev Five research articles: 1. Educational AI Chatbots for Content and Language Integrated Learning https://lnkd.in/gB-xzWM5 2. Overview of Power Electronic Converter Topologies Enabling Large-Scale Hydrogen Production via Water Electrolysis https://lnkd.in/gQrwdKUu 3. A Good Practice for the Proof Testing of Cable-Stayed Bridges https://lnkd.in/g365R5br 4. Microalgal Proteins and Bioactives for Food, Feed, and Other Applications https://lnkd.in/g__-i7jj 5. Sort and Deep-SORT Based Multi-Object Tracking for Mobile Robotics: Evaluation with New Data Association Metrics https://lnkd.in/gSa6vEQh For more information, please visit: 🔗https://lnkd.in/gajs_WK5

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Recommended for your reading article about CAD-based neutronics analyses

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I am excited to announce that our latest research paper titled "A novel hybrid PI–backstepping cascade controller for battery–supercapacitor electric vehicles considering various driving cycles scenarios," has been accepted and published in the prestigious IET Power Electronics journal! 😊 This paper presents a novel hybrid control technique designed to address the challenge of DC-bus voltage stability in case of power load fluctuations and uncertainties in electric vehicles powered by batteries and supercapacitors. This innovative approach combines the advantages of PI-based linear controllers and Backstepping-based nonlinear controllers in a cascade structure. For further insights into our research, you can access the article through this link: https://lnkd.in/gwDuWvpv I would like to warmly thank the co-authors who contributed to the success of this work. In addition, I am excited to announce my openness to collaborations and contributions in #Hybrid_Energy_Storage_Systems, #EVs, and #Smart_Grids. Particularly in #Power_and_Energy_Management_Strategies, #Power_electronics_controllers, #MATLAB_and_Simulink_simulations, and #Hardware_In_The_Loop validations.

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ATTN Structural Engineers! Check out this white paper from Data Physics Corporation about Risk Mitigation During Structural Qualification of Flight Hardware. Raman Sridharan goes into details on the structural qualification of flight hardware and inherent risks, including damage caused by over-test or transients caused by the abrupt shutdown of the shaker. https://lnkd.in/gEqpj5P2

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The following article appeared in an issue of Focus on Materials, a quarterly bulletin produced by the Pennsylvania State University's Materials Research Institute. Professor Ram Narayanan of Penn State's College of Engineering worked with Remcom to produce a 5G millimeter wave coverage concept using existing AT&T towers in State College, PA, showing ray path predictions generated in Wireless InSite. Here Professor Narayanan discusses the challenges facing 5G signal propagation. #5G #MIMO #mmwave #software

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Define non-uniform boundary conditions in Azore using the profile data of your choice. Find out how with today's Pro Tip! #cfd #fluiddynamics #computationalfluiddynamics #engineering #simulationsoftware #engineeringsoftware #aerodynamics

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NEW PAPER ON TURBULENT SCALAR FLUX CLOSURE IN PREMIXED FLAME-WALL INTERACTION ============================================================================= This paper is the latest contribution from our research activities on modelling premixed turbulent premixed flame-wall interaction. The three-dimensional Direct Numerical Simulations (DNS) data of unsteady head-on quenching of turbulent premixed flames propagating across turbulent boundary layers and statistically stationary oblique-wall quenching of V-shaped turbulent premixed flames for friction Reynolds numbers of 110 and 180 has been utilised to analyse the statistical behaviour of turbulent scalar fluxes of reaction progress variable and non-dimensional temperature in the context of Reynolds Averaged Navier-Stokes (RANS) simulations. The model expressions for turbulent scalar fluxes of reaction progress variable and non-dimensional temperature have been identified based on a priori DNS analysis for premixed flame-wall interaction within turbulent boundary layers. More information can be found here: Direct Numerical Simulation Analysis of the Closure of Turbulent Scalar Flux during Flame–Wall Interaction of Premixed Flames within Turbulent Boundary Layers: : https://lnkd.in/eWs-97mA

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Discover how the flow probe helps scan the flow of air in 3D and realtime so aerodynamic engineers can clearly see the effect of flow in hard to measure areas. #FlowMeasurement #ProCapSystem

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The latest issue of the SAE International Journal of Engines is out now! Preview the eight articles comprising this issue below. These articles present cutting-edge research into: • engine noise and vibration reduction • chemical kinetics computation • passive pre-chamber jet ignition • AI-based virtual sensing of pollutant emissions • machine learning-based modeling and control of combustion phasing and load • development of a turbulent jet-controlled compression ignition engine concept The SAE International Journal of Engines is a peer-reviewed research journal dedicated to internal combustion engine science and engineering. With a 2022 Journal Impact Factor of 1.2, the journal spotlights innovative and archival technical reports on all aspects of internal combustion engine development, including research, design, analysis, control, and emissions. Browse the issue and download the full articles with a subscription to SAE Mobilus® here: https://sae.to/45sDfv5 #automotiveengineering #research #engines

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We are excited to share a significant advancement featured in the Journal of Thermal Analysis and Calorimetry. The pyDSC script for differential scanning calorimetry (DSC) data treatment enhances accuracy and reliability, setting a new standard in DSC data analysis. Key Highlights: • The pyDSC script, written in Python, greatly improves baseline subtraction and buffer corrections. • Tested on Pluronic P85, it has shown exceptional robustness and precision. Implications for Your Lab: • This script elevates the precision of thermal analysis, ensuring more reliable results for your research and applications. Free Access: • The pyDSC script is freely available, enabling you to adopt this cutting-edge tool in your lab. Read the full article here: https://lnkd.in/gma256VH #Laboratorium #ThermalAnalysis #DSC #LaboratoryEquipment #DataAnalysis

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In this article, scholars explored the formation process of Nanofiber core-spun yarn (NCSY) and its mechanism for regulating shape using finite element analysis and response surface analysis methods. This enabled us to establish a mathematical model for predicting various forms of yarn. As proof-of-concept applications, they prepared shape-controllable nanofiber core-spun yarns for thermal-moisture management and solar steam generation. These yarns exhibit several characteristics. These properties are of guiding significance for preparing diverse styles of NCSY according to demand and designing functional and intelligent textiles by adjusting the types of core and shell fibers. https://lnkd.in/ePbm9_rG

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Call for Topic/Session Proposals: ASME SSDM 2025 Conference   The ASME Aerospace Structure, Structural Dynamics, and Materials (SSDM) Technical Committees are excited to announce the opening of the call for topic proposals for the ASME SSDM 2025 Conference (https://lnkd.in/gksPbXaq)! We invite aerospace engineers and professionals from diverse backgrounds to contribute to our technical program.   Proposal Submission Details: We are seeking topic proposals on a wide range of topics relevant to aerospace engineering. Proposals that advance the SSDM mission by fostering diverse collaboration, promoting R&D partnerships, driving product and technology innovations, exchanging novel ideas, and enhancing leadership development, education, and workforce training are highly encouraged.   The SSDM committee aims to balance participation from academia, government, and industry to maximize community impact and benefits.   Submission Deadline: All proposals must be submitted by July 8, 2024, at 10:00 PM ET.   Submission Requirements: Tentative topic title Topic organizer names and contact information (2-3 organizers) Short description of topic scope (100-200 words) Potential presenters (optional, preferred 5 names) Please email the above information to any of the below contacts   Contact Information: SSDM Vice Technical Chair: Yongming Liu (yongming.liu@asu.edu) We look forward to your innovative proposals and your participation in advancing the aerospace community through this exciting conference!

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Fluid flow simulation through pipe subjects to oscillation. https://lnkd.in/d3wBUdWs

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Immersion Cooling Effect on Heat sinks’ Performance CFD Simulation $60.00 This project simulates the effect of immersion cooling on heat sinks’ performance in ANSYS Fluent software. The 3D model is designed using the Spaceclaim, then meshed using ANSYS Meshing producing 85,000 cells. The k-epsilon RNG turbulence model is employed to accurately predict flow patterns. https://lnkd.in/dtH8FxMt

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