Results 41 to 50 of about 247,344 (269)

Tribological Performance of 60NiTi Alloy Under Varying Contact Conditions and Elevated Temperatures in Linear Reciprocating Sliding

Advanced Engineering Materials, EarlyView.
This study investigates the tribological response of 60NiTi alloy under dry, water‐lubricated and high‐temperature conditions. The alloy exhibits decreasing wear volume and friction with increasing temperature due to the formation of protective oxide layers. The work clarifies dominant wear mechanisms and demonstrates the suitability of 60NiTi for high‐
Anthony Onyebuchi Okoani, Miguel Angel Selles, Maziar Ramezani   +2 more
wiley   +1 more source

An Ensemble Mean and Evaluation of Third Generation Global Climate Reanalysis Models

Atmosphere, 2018
We have produced a global ensemble mean of the four third-generation climate reanalysis models for the years 1981–2010. The reanalysis system models used in this study are National Centers for Environmental Prediction (NCEP) Climate Forecast System
Jeffrey D. Auger, Sean D. Birkel, Kirk A. Maasch, Paul A. Mayewski, Keah C. Schuenemann   +4 more
doaj   +1 more source

Active Flow Control at Low Reynolds Numbers by Periodic Airfoil Morphing [PDF]

, 2016
This paper investigates the application of a periodically deforming airfoil surface for the purpose of flow control at low Reynolds numbers. A physical model has been fabricated by bonding Macro Fiber Composite (MFC) actuators to the underside of a NACA ...
Debiasi, M, Jones, G, Papadakis, G, Santer, M   +3 more
core   +1 more source

A Topology Optimization Framework for the Inverse Design of Nonlinear Mechanical Metamaterials

Advanced Engineering Materials, EarlyView.
This work uses topology optimization to design unit cells for mechanical metamaterials with a prescribed nonlinear stress–strain response. The framework adds contact and postbuckling modeling to synthesize microstructures for three highly nonlinear responses, including pseudoductile behavior, monostable with snap‐through buckling, and bistable ...
Charlie Aveline, Matthew Santer, Robert Hewson   +2 more
wiley   +1 more source

BPANS: A Turbulence Model That Spans the Speed Range from Subsonic to Supersonic Flows

Aerospace
Unsteady turbulent flows are present in most engineering applications of practical relevance. In aeronautics, these applications span the speed range from subsonic to hypersonic flows.
Gabriel Nastac, Noah Schwalb, Abdelkader Frendi   +2 more
doaj   +1 more source

Numerical 3D study on the influence of spanwise distribution of tubercles on wings for UAV applications [PDF]

MATEC Web of Conferences, 2019
In this work, a 3D numerical study on the influence of the spanwise distribution of tubercles for UAV applications is presented. The idea of using tubercles in aeronautics comes from the humpback whale (Megaptera novaeangliae) which has a characteristic ...
Papadopoulos Charalampos, Katsiadramis Vasilis, Yakinthos Kyros   +2 more
doaj   +1 more source

Reactant Jetting in Unstable Detonation [PDF]

, 2009
We note the common existence of a supersonic jet structure locally embedded within a surrounding transonic flow field in the hitherto unrelated phenomena of unstable gaseous detonation and hypervelocity blunt body shock wave interaction. Extending prior
Austin J.M., Edney B.E., Edney B.E., Hornung H.G., Hornung H.G., Konnov A., Oppenheim A., Subbotin V., Urtiew P.   +8 more
core   +1 more source

Copper‐Based Crystalline‐Metallic Glass Composite Thin Films: A Novel Material with Enhanced Strength and Thermally Stable Nanotwins

Advanced Functional Materials, EarlyView.
A Cu‐based crystal‐glass composite with high‐density twins is identified by a fast screening technique using combinatorial sputtering together with XRD and nanoindentation mapping. This bamboo‐like structure demonstrates homogenous plastic flow and retains high strength during in situ high temperature tests, up to 1 GPa at 550°C, owing to those ...
Chunhua Tian, Amit Sharma, Krzysztof Wieczerzak, Alexander Groetsch, Manish Jain, Nicolò Maria della Ventura, Remo Widmer, Fedor F. Klimashin, Johann Michler, Jakob Schwiedrzik, Xavier Maeder   +10 more
wiley   +1 more source

Exploring the Environmental Conditions of Snow Particles Using Spaceborne Triple-Frequency Radar Measurements over Ocean

Remote Sensing, 2022
The environmental conditions of snow particles with different particle sizes and bulk effective densities over the ocean are explored using a coincidence dataset of National Aeronautics and Space Administration (NASA) CloudSat Cloud Profiling Radar (CPR)
Mengtao Yin, Cheng Yuan
doaj   +1 more source

Unraveling Quantitative Sensing Mechanism and Predictive Molecular Metrics for High‐Performance OFET Amine Sensors

Advanced Functional Materials, EarlyView.
This study introduces a novel chloro boron subphthalocyanine/polymer blend OFET sensor achieving 0.005 ppb limit of detection for ammonia at room temperature and high selectivity against similar amines. An original theoretical framework is proposed to describe the sensing mechanism, relating analyte molecular volume and Lewis basicity to sensor ...
Kavinraaj Ella Elangovan, Matthew P. Confer, Rui Zhang, Siqing Wang, Jeffrey S. Moore, Rohit Bhargava, Ying Diao   +6 more
wiley   +1 more source