Physics-Informed Neural Surrogates for Mesh-Invariant Modeling of High-Speed Flows at #AIAA #SciTech!
High-speed flight simulation is computationally brutal. A single CFD run can take hours on a cluster. That's fine for final validation, but not for early design exploration or real-time decision-making.
Neural surrogate that predicts aerodynamic behavior 595x faster than CFD while maintaining ~1% relative error.
Paper: https://lnkd.in/efe2Q_T9
Just published on #AIAA #JGCD, Zitong Lin's first journal article:
"Displaced Solar Sail Orbits Around Asteroids with Free Angular Velocity"
'Field Evaporation Simulation in #ElectrosprayThrusters Using Electrohydrodynamics–Particle-in-Cell Method' - an article in the #AIAA Space Collection on #ScienceOpen:
🗞️🔗 https://www.scienceopen.com/document?vid=42d598ba-d5b1-4fa6-b940-6cfb41a67474
#ElectricPropulsion #ParticleInCell #Electrohydrodynamics #SpaceTech
<p xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" class="first" dir="auto" id="d3974389e225">Ionic liquids in electrospray thrusters undergo elongation and ion emission when subjected to strong electric fields. This process typically involves multiple physical fields and spans various temporal and spatial scales. In this study, a fully coupled electrohydrodynamics–particle-in-cell method is proposed to perform transient simulation of this process. Based on this method, the dynamic deformation of freely suspended ionic liquid droplets in an electric field was simulated, changes in physical quantities (such as surface charge density, current density, and velocity over time) were recorded, and the acceleration and displacement of emitted ions in the electric field were captured. In this study, the impact of emitted ions on the electrohydrodynamic behavior of droplets was analyzed in detail and the significance of this impact under different ion masses and droplet conductivities was compared. The results indicate that the ion beam has certain inhibitory effects on the deformation and ion evaporation process of the droplets, with the inhibitory effects becoming more pronounced as the ion mass and conductivity increase. Although conductivity remains the primary limiting factor in the field evaporation process of ionic liquids, it can be anticipated that space-charge effects will eventually replace conductivity as the dominant limiting factor as conductivity continues to increase. </p>
'Aerodynamic Sensitivities over Separable Shape Tensors' - an article in the #AIAA Space Collection on #ScienceOpen:
🔗 https://www.scienceopen.com/document?vid=3770c3e4-34dc-4553-b314-b064aa3a9573
#AerospaceEngineering #Aerodynamics #FluidDynamics #Aeronautics #AirfoilDesign
<p xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" class="first" dir="auto" id="d3978712e218">We present a comprehensive aerodynamic sensitivity analysis of airfoil parameterization informed by separable shape tensors. This parameterization approach uniquely benefits the design process by isolating various well-studied shape characteristics, such as airfoil thickness, and providing a well-regulated low-dimensional parameter domain for aerodynamic designs. Exploring the aerodynamic sensitivities of this novel parameterization can provide valuable insights for more robust designs and future manufacturing efforts. We construct a data-driven parameter space of airfoils using principal geodesic analysis of separable shape tensors informed by a curated database containing almost 20,000 suitable engineering airfoils. Analyzing the shape reconstruction error and the maximum mean discrepancy between joint distributions of aerodynamic quantities, we study the dimensionality of the learned parameter space. This simple numerical experiment demonstrates a dramatic dimension reduction that retains design effectiveness and promotes regularity of the shape representations. Finally, we generate new airfoils and use the HAM2D Reynolds-averaged Navier–Stokes solver to predict lift, drag, and moment coefficients. We compute multiple sensitivity metrics to quantify and assert the consistency of parameter influence on the aerodynamic quantities. We also explore low-dimensional polynomial ridge approximations to motivate physical intuitions and offer explanations of the approximated sensitivities. </p>
'Field Evaporation Simulation in Electrospray Thrusters Using Electrohydrodynamics–Particle-in-Cell Method' - an article in the #AIAA Space Collection on #ScienceOpen:
🔗 https://www.scienceopen.com/document?vid=42d598ba-d5b1-4fa6-b940-6cfb41a67474
#AerospaceEngineering #Electrohydrodynamics #ElectrosprayThruster #SpacePropulsion
<p xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" class="first" dir="auto" id="d3974389e225">Ionic liquids in electrospray thrusters undergo elongation and ion emission when subjected to strong electric fields. This process typically involves multiple physical fields and spans various temporal and spatial scales. In this study, a fully coupled electrohydrodynamics–particle-in-cell method is proposed to perform transient simulation of this process. Based on this method, the dynamic deformation of freely suspended ionic liquid droplets in an electric field was simulated, changes in physical quantities (such as surface charge density, current density, and velocity over time) were recorded, and the acceleration and displacement of emitted ions in the electric field were captured. In this study, the impact of emitted ions on the electrohydrodynamic behavior of droplets was analyzed in detail and the significance of this impact under different ion masses and droplet conductivities was compared. The results indicate that the ion beam has certain inhibitory effects on the deformation and ion evaporation process of the droplets, with the inhibitory effects becoming more pronounced as the ion mass and conductivity increase. Although conductivity remains the primary limiting factor in the field evaporation process of ionic liquids, it can be anticipated that space-charge effects will eventually replace conductivity as the dominant limiting factor as conductivity continues to increase. </p>
🔭 The #AIAA Space Collection features a wide array of Aerospace Research Central (ARC) publications from the world’s largest technical society dedicated to the global #Aerospace profession.
Explore the latest additions to ARC on #ScienceOpen ➡️ https://www.scienceopen.com/collection/AIAA_Space
#AIAA:
"
Resilience Lunar Lander to Attempt ‘Sea of Cold’ Moon Landing This Week
"
".. will attempt to touch down in Mare Frigoris (“Sea of Cold”), a basalt plain in the moon’s northern hemisphere, on Thursday (June 5) at 3:24 p.m. EDT (1924 GMT). .."
https://aiaa.org/2025/06/03/ispaces-resilience-lander-to-attempt-sea-of-cold-moon-landing-this-week/
3.6.2025
#HAKUTOR #Ispace #Mond #Mondlander #Raumfahrt #Resiliance #Rover #SpaceFlight #Tenacious
There is still a few days left before the #AIAA/HySky Advanced Hydrogen Aerospace #Technologies and Design - Online Short Course starts!
Join us for a series of online lecture in October and November to learn about #hydrogen technologies for #aviation.
Registration at this link: https://www.aiaa.org/events-learning/courses-workshops/detail/advanced-hydrogen-aerospace-technologies-and-design.
#aerospace #aircraft #airports #climateaction #energytransition #engineering #infrastructure #innovation #mobility #research #stem #verticalflight #vertiports
Lockheed Martin's vision for a sustainable water- and nuclear-based lunar economy that was presented at the 2024 AIAA ASCEND & AVIATION Forums: https://lockheedmartin.com/lunar-architecture-novella. 🚀🌕
#aerospace #aiaa #engineering #infrastructure #moon #space #stem
Dr. Chris Rackauckas 
Matteo Ceriotti
ScienceOpen
RTN
Hard X-ray Male 🇺🇸🇺🇦🐊🦉🌊💙
Gaël Le Bris