Results 31 to 40 of about 19,940 (264)

Molecular dynamics of flows in the Knudsen regime [PDF]

, 2000
Novel technological applications often involve fluid flows in the Knudsen regime in which the mean free path is comparable to the system size. We use molecular dynamics simulations to study the transition between the dilute gas and the dense fluid ...
Allen, Bhattacharya, Bhushan, Bitsanis, Cercignani, Cieplak, Ehrfeld, Grest, Hoover, Jayanth R. Bavanar, Joel Koplik, Kennard, Kim (Ed.), Koplik, Koplik, Loose, Marek Cieplak, Marlow (Ed.), Maxwell, Maxwell, Morris, Muntz, Nose, Sugano, Tehver, Thompson   +25 more
core   +3 more sources

Nitride‐Reinforced Metal Matrix Nanocomposite Powders Production by Plasma‐Assisted Thermochemical Treatment of Intermetallic Powders

Advanced Engineering Materials, EarlyView.
This study proposes a new methodology for producing metal matrix nanocomposites in the solid state. The process involves the plasma‐assisted thermochemical treatment of metallic alloy powders. As a proof‐of‐concept, TiN nanoparticles are synthesized directly on the surface of FeTi intermetallic powder particles, enabling the development of the ...
Deivison Daros Paim, Antônio Rogério de Souza, Tatiana Bendo, Aloisio Nelmo Klein, Rodrigo Perito Cardoso   +4 more
wiley   +1 more source

Research on the Dynamics Model and Jump/Drop Control Strategy of Distributed-Propeller Unmanned Aerial Vehicles

Applied Sciences
Compared with conventional drones, distributed powered drones have significant advantages in handling stability characteristics, lift and drag characteristics, and takeoff and landing performance.
Yansheng Geng, Xinxin Chen, Yinglong He, Xiaoping Xu   +3 more
doaj   +1 more source

Microstructural Evolution and Vacancy Defect Formation in Mn–Mo–Ni RPV Steel Under Low Cycle Fatigue: Insights From EBSD and PALS

Advanced Engineering Materials, EarlyView.
Low‐cycle fatigue damage in Mn–Mo–Ni reactor pressure vessel steel is examined using a combined electron backscatter diffraction and positron annihilation lifetime spectroscopy approach. The study correlates texture evolution, dislocation substructure development, and vacancy‐type defect formation across uniform, necked, and fracture regions, providing
Apu Sarkar, Dhanadeep Dutta, G. Bharat Reddy   +2 more
wiley   +1 more source

Patterning the Void: Combining L‐Systems with Archimedean Tessellations as a Perspective for Tissue Engineering Scaffolds

Advanced Functional Materials, EarlyView.
This study introduces a novel multi‐scale scaffold design using L‐fractals arranged in Archimedean tessellations for tissue regeneration. Despite similar porosity, tiles display vastly different tensile responses (1–100 MPa) and deformation modes. In vitro experiments with hMSCs show geometry‐dependent growth and activity. Over 55 000 tile combinations
Maria Kalogeropoulou, Kenny A. van Kampen, Pierpaolo Fucile, Carlos Mota, Lorenzo Moroni   +4 more
wiley   +1 more source

Uranium isotopic separation by aerodynamic methods. Final report. [Jet membrane and velocity slip processes]

, 1979
The jet membrane is a new aerodynamic setaration concept for enriching uranium. The project described in this report had two objectives: (1) to demonstrate experimentally that uranium isotopes can be separated using the jet membrane concept, and (2) to make an assessment of the economic viability of the jet membrane in relation to competing processes ...
P. Davidovitz, J. Anderson, J. Brook, V. Calia, G. Green   +4 more
openaire   +3 more sources

Investigations on the Turbulent Wake of a Generic Space Launcher Geometry in the Hypersonic Flow Regime [PDF]

, 2011
The turbulent wake flow of generic rocket configurations is investigated experimentally and numerically at a freestream Mach number of 6.0 and a unit Reynolds number of 10 x 10^6.
Glatzer, Christian, Gülhan, Ali, Henckels, Andreas, Meinke, Matthias, Meiß, Jan-Hendrik, Saile, Dominik, Schröder, Wolfgang   +6 more
core  

Ionic Control of Microstructure and Lubrication in Charged, Physically Cross‐Linked Hydrogels

Advanced Functional Materials, EarlyView.
Here, charged, physically cross‐linked poly(methacrylamide‐co‐methacrylic acid) hydrogels stabilized by a short‐range attractive, long‐range repulsive potential is investigated. This work uncovers how salt addition alters not only swelling, but also the microstructure and dynamics, near‐surface stiffness and charge, and ultimately, its lubricity. Salts
Alexander Deptula, Rosa M. Espinosa‐Marzal   +1 more
wiley   +1 more source

Microporous Microgel Assemblies Facilitating the Recruitment and Osteogenic Differentiation of Progenitor Cells for Bone Regeneration

Advanced Functional Materials, EarlyView.
There is a significant need for biomaterials with well‐defined stability and bioactivity to support tissue regeneration. In this study, we developed a tunable microgel platform that enables the decoupling of stiffness from porosity, thereby promoting bone regeneration.
Silvia Pravato, Haishuo Guan, Bianca M. Carrara, Mira Jacobs, Matteo Monticelli, Lukas Moser, Thomas Moragues, Andrew J. deMello, Tomaso Zambelli, Martin Ehrbar   +9 more
wiley   +1 more source

Longitudinal and transversal flow over a cavity containing a second immiscible fluid

, 2012
An analytical solution for the flow field of a shear flow over a rectangular cavity containing a second immiscible fluid is derived. While flow of a single-phase fluid over a cavity is a standard case investigated in fluid dynamics, flow over a cavity ...
Cherepanov, Clarissa Schönecker, Karniadakis, Keldysh, Lauga, Lawrentjew, Muskhelishvili, Muskhelishvili, Navier, Nosonovsky, Smirnow, Sotkilava, Steffen Hardt   +12 more
core   +1 more source