Results 81 to 90 of about 468,934 (298)

Nonlinear simulations of magnetic Taylor-Couette flow with current-free helical magnetic fields [PDF]

, 2006
The magnetorotational instability (MRI) in cylindrical Taylor-Couette flow with external helical magnetic field is simulated for infinite and finite aspect ratios.
Balbus, Burin, Hollerbach, Hollerbach, Ji, Ji, Kageyama, Roberts, Rüdiger, Rüdiger, Stefani, Velikhov, Willis, Youd, Zikanov   +14 more
core   +2 more sources

Vertical Shear Instability and Photoevaporative Winds

, 2020
In recent years hydrodynamical (HD) models have become important to describe the gas kinematics in protoplanetary disks, especially in combination with models of photoevaporation and/or magnetically driven winds. Our aim is to investigate how vertical shear instability (VSI) could influence the thermally driven winds on the surface of protoplanetary ...
openaire   +1 more source

Vertical shear instability with partially reflecting boundary conditions

Monthly Notices of the Royal Astronomical Society
ABSTRACT The vertical shear instability (VSI) is widely believed to be effective in driving turbulence in protoplanetary discs (PPDs). Prior studies on VSI exclusively exploit the reflecting boundary conditions (BCs) at the disc surfaces. VSI depends critically on the boundary behaviours of waves at the disc surfaces.
Yuzi Wu, Cong Yu, Can Cui
openaire   +2 more sources

Phase Field Failure Modeling: Brittle‐Ductile Dual‐Phase Microstructures under Compressive Loading

Advanced Engineering Materials, EarlyView.
The approach by Amor and the approach by Miehe and Zhang for asymmetric damage behavior in the phase field method for fracture are compared regarding their fitness for microcrack‐based failure modeling. The comparison is performed for the case of a dual‐phase microstructure with a brittle and a ductile constituent.
Jakob Huber, Jan Torgersen, Ewald Werner
wiley   +1 more source

Prediction of development height of water-conducting fracture zone based on rotational subsidence

Meikuang Anquan
The development height of water-conducting fracture zone(WCFZ) is an important parameter for water disaster treatment in coal mine roof. In this paper, the failure process of mining overlying rock is analyzed, and the rock instability failure in the ...
Daolei XIE, Xinghong JIANG, Chenghao HAN, Kai WANG, Huiyong YIN, Jiulei YAN   +5 more
doaj   +1 more source

Microstructure Evolution of a VMnFeCoNi High‐Entropy Alloy After Synthesis, Swaging, and Annealing

Advanced Engineering Materials, EarlyView.
The synthesis and processing (rotary swaging and annealing) of the novel VMnFeCoNi alloy is investigated, alongside the estimation of the grain size effect on hardness. Analysis of a wide grain size range of recrystallized microstructures (12–210 µm) reveals a low annealing twin density.
Aditya Srinivasan Tirunilai, Zeki Ayrildi, Buse Şen, Maik Rajkowski, Mathias Redondo Garcia, Markus Stricker, Guillaume Laplanche   +6 more
wiley   +1 more source

Workflow for Design of Experiments‐Based Modeling of Species Transport and Growth Kinetics in GaN Hydride Vapor Phase Epitaxy

Advanced Engineering Materials, EarlyView.
A novel workflow for investigating hydride vapor phase epitaxy for GaN bulk crystal growth is proposed. It combines Design of experiments (DoE) with physical simulations of mass transport and crystal growth kinetics, serving as an intermediate step between DoE and experiments.
J. Tomkovič, G. Lukin, H. Torkashvand, A. Kerschbaum, M. Müller, S. Besendörfer, J. Heitmann, J. Friedrich   +7 more
wiley   +1 more source

The effect of ankle taping on dynamic stability and active range of motion in the female athletes with and without chronic ankle instability

Physical Treatments, 2014
Objective: The purpose of this investigation is the study of the effect of ankle taping on dynamic stability and active range of motion in the female athletes with and without chronic ankle instability.
Tahereh Pourkhani, Ali Asghar Norasteh, Ali Shamsi, Mohammad Ali Sanjari   +3 more
doaj  

Vertical pairing of identical particles suspended in the plasma sheath

, 2001
It is shown experimentally that vertical pairing of two identical microspheres suspended in the sheath of a radio-frequency (rf) discharge at low gas pressures (a few Pa), appears at a well defined instability threshold of the rf power. The transition is
A. Homann, A. Melzer, A. Melzer, A. Melzer, A. Melzer, A. V. Ivlev, A. V. Ivlev, D. P. Resendes, F. Melandsø, G. Morfill, H. Thomas, H. Thomas, J. H. Chu, K. Takahashi, P. J. Hargis, Jr., R. A. Quinn, R. Sütterlin, S. V. Vladimirov, V. A. Schweigert, V. Steinberg, Y. Hayashi   +20 more
core   +1 more source

Copper Nanocrystallization in Anodic Oxide Films of Ti–Cu‐Based Bulk Metallic Glass and Its Effect on the Corrosion Resistance and Cytocompatibility

Advanced Engineering Materials, EarlyView.
Viktoriia Shtefan, Thorgund Nemec, Ute Hempel, Annett Gebert and coworkers demonstrate that anodic treatment of Ti–Cu‐based metallic glass in a nontoxic pyrophosphate electrolyte forms a protective bilayered Ti/Zr‐oxide film enriched with Cu nanocrystals.
Viktoriia Shtefan, Nora Fernández Navas, Thorgund Nemec, Ivan Kaban, Ute Hempel, Andrea Voss, Volker Hoffmann, Darius Pohl, Annett Gebert   +8 more
wiley   +1 more source