Results 31 to 40 of about 130,525 (161)
Advanced Science, Volume 12, Issue 10, March 13, 2025.A functionally graded oxide scale comprising a dense top layer and an underlying fine‐grained layer with a grain size gradient forms on a multicomponent (Hf,Zr,Ti)B2 coating through Ti content optimization. The former is a superior oxygen barrier, and the latter ensures strain tolerance, collectively manifesting the coating's exceptional ablation ...
Junshuai Lv +9 more
wiley +1 more source
Small Methods, Volume 9, Issue 3, March 20, 2025.The two extremes of self‐assembled colloids are stiff perfect crystals and soft perfect glasses. But what happens in between? The answer is provided by elasticity mapping of a wide variety of colloidal glasses – continuous gradient structures, binary mixtures, and more – with scanning micro‐Brillouin light scattering.
Thomas Vasileiadis +5 more
wiley +1 more source
Hypersonic Similarity for the Two Dimensional Steady Potential Flow with Large Data [PDF]
arXiv, 2019 In this paper, we establish the first rigorous mathematical global result on the validation of the hypersonic similarity, which is also called the Mach-number independence principle, for the two dimensional steady potential flow. The hypersonic similarity is equivalent to the Van Dyke's similarity theory, that if the hypersonic similarity parameter $K$
arxiv
The Moving Discontinuous Galerkin Method with Interface Condition Enforcement for the Simulation of Hypersonic, Viscous Flows [PDF]
arXiv, 2023 The moving discontinuous Galerkin method with interface condition enforcement (MDG-ICE) is a high-order, r-adaptive method that treats the grid as a variable and weakly enforces the conservation law, constitutive law, and corresponding interface conditions in order to implicitly fit high-gradient flow features. In this paper, we develop an optimization
arxiv
Bipolar HiPIMS kick‐pulse for high hardness in high‐entropy boride thin films
Journal of the American Ceramic Society, Volume 108, Issue 3, March 2025.Abstract We report a microhardness indentation study for multicomponent refractory metal boride thin films that belong to the family of high‐entropy ceramics exhibiting superior hardness and high temperature properties. We focus on the nominally equimolar composition (Ti0.2Zr0.2Hf0.2Nb0.2Ta0.2)B2, which we refer to as HEB3, on c‐plane sapphire ...
Nathaniel S. McIlwaine +7 more
wiley +1 more source
New Impacts on Mars: Unraveling Seismic Propagation Paths Through a Cerberus Fossae Impact Detection
Geophysical Research Letters, Volume 52, Issue 3, 16 February 2025.Abstract To date, eight meteoroid impacts have been identified in the seismic record of NASA's InSight mission on Mars, occurring either within 300 km or beyond 3,500 km. We report the association of a high‐frequency marsquake, S0794a, with a new 21.5‐m‐diameter impact crater discovered at an intermediate distance of 1,640 km in the tectonically active
Constantinos Charalambous +14 more
wiley +1 more source
International Journal for Numerical Methods in Engineering, Volume 126, Issue 3, 15 February 2025.ABSTRACT This article is dedicated to the development of a model to simulate fast transient compressible flows on solid structures using immersed boundary method (IBM) and a lattice Boltzmann solver. Ultimately, the proposed model aims at providing an efficient algorithm to simulate strongly‐coupled fluid‐structure interactions (FSI). Within this goal,
Hippolyte Lerogeron +3 more
wiley +1 more source
IET Cyber-Physical Systems: Theory &Applications, Volume 10, Issue 1, January/December 2025.Coupled multidisciplinary systems are crucial in fields like aerospace and robotics, where accurate analysis depends on effectively estimating uncertainties. This paper introduces a framework using a non‐linear/non‐Gaussian hidden Markov model (HMM) to capture the stochastic nature of these systems, employing particle filtering and Bayesian ...
Negar Asadi, Seyede Fatemeh Ghoreishi
wiley +1 more source
IET Control Theory &Applications, Volume 19, Issue 1, January/December 2025.A neuro‐adaptive FO prescribed performance backstepping control strategy is performed by using a predetermined performance function with a backstepping control technique to suppress non‐linear motion and improve the transient and steady‐state performance of the controlled object.
Le Zhao, Guanci Yang, Kexin Luo, Ling He
wiley +1 more source
International Journal of Aerospace Engineering, Volume 2025, Issue 1, 2025.The choice of turbulence model significantly impacts the prediction of the supersonic combustion flow field. In this study, the transient autoignition process and steady supersonic combustion performance of methane fuel with adjustable reactivity in a scramjet combustor were numerically investigated, employing different turbulence models including ...
Zihan Wang +6 more
wiley +1 more source