Results 111 to 120 of about 10,024 (247)

Topics in microphysics of relativistic plasmas

, 2013
Astrophysical plasmas can have parameters vastly different from the more studied laboratory and space plasmas. In particular, the magnetic fields can be the dominant component of the plasma, with energy-density exceeding the particle rest-mass energy ...
Lazarian, Alexandre, Lyutikov, Maxim
core   +1 more source

Actuation Strategies for Underwater Jet‐Propelled Soft Robots

Journal of Field Robotics, EarlyView.
ABSTRACT This review article examines jet‐propulsion mechanisms in underwater soft robotic systems, focusing exclusively on physically fabricated and experimentally validated robots. Covering research published from 2013 to 2025, this study classifies and evaluates jet‐propulsion robots based on their actuation mechanisms.
Angel Kitone, Mohammed Anteet, Pawandeep S. Matharu, Yara Almubarak   +3 more
wiley   +1 more source

Computational Fluid Dynamics Analysis of Draft Tube Flow Characteristics in a Kaplan Turbine

Actuators
This study presents a numerical investigation of the internal flow characteristics within the draft tube of a Kaplan turbine using computational fluid dynamics (CFD).
Qinwen Yan, Zhiqiang Xiong, Yuan Zheng, Chen Feng, Zhen Li, Lin Hu, Lianchen Xu   +6 more
doaj   +1 more source

Experimental Investigation on the Characteristics of Hydrodynamic Stabilities in Francis Hydroturbine Models

Advances in Mechanical Engineering, 2014
This paper presents an experimental investigation of flow phenomena related to the characteristic frequencies of pressure fluctuation in Francis hydroturbine models.
Wen-Tao Su, Xiao-Bin Li, Feng-Chen Li, Xian-Zhu Wei, Wen-Fu Han, Shu-Hong Liu   +5 more
doaj   +1 more source

Pressure Fluctuations in the S-Shaped Region of a Reversible Pump-Turbine

Energies, 2017
Numerical simulations were performed to investigate pressure fluctuations in the S-shaped region of a pump-turbine model. Analyses focused on pressure fluctuations in the draft tube and in the gap between the guide vanes and runner.
Zijie Wang, Baoshan Zhu, Xuhe Wang, Daqing Qin   +3 more
doaj   +1 more source

Braids of entangled particle trajectories

, 2009
In many applications, the two-dimensional trajectories of fluid particles are available, but little is known about the underlying flow. Oceanic floats are a clear example.
Birman J. S., Fathi A., Jean-Luc Thiffeault   +2 more
core   +1 more source

Machine learning‐driven advances in carbon‐based quantum dots: Opportunities accompanied by challenges

Responsive Materials, EarlyView.
Machine learning provides a unifying framework to connect structure, fluorescence properties, and applications of carbon‐based quantum dots. This review highlights how data‐driven strategies enable fluorescence regulation, reveal underlying mechanisms, and accelerate the rational design of functional carbon dots.
Liangfeng Chen, Siwei Yang, Xiangqian Cui, Ziheng Liu, Hang Wang, Yongqiang Li, Peng He, Miao Wang, Guqiao Ding   +8 more
wiley   +1 more source

Regimes with high levels of pressure pulsations in the model of Francis-99 hydro-turbine draft tube

Известия высших учебных заведений: Проблемы энергетики, 2017
The paper reports on the regimes of flow with high level of pressure pulsations in a laboratory air model of the Francis-99 hydro turbine draft tube.
I. V. Litvinov, A. S. Mitryakov, S. I. Shtork   +2 more
doaj   +1 more source

Improvement of propeller static thrust estimation Status report, 1 Nov. 1968 - 31 Aug. 1969 [PDF]

Aerodynamic load effects on propeller blade ...
Kettleborough, C. F.
core   +1 more source

Vortex rope for overload operation of Francis turbine [PDF]

, 2013
Diplomová práce se zabývá CFD simulací vírového copu v kolenové sací troubě Francisovy turbíny při nadoptimálním provozu. Hlavním cílem práce je srovnání výsledků CFD simulací provedených pro původní kolenovou sací troubu a odvozenou sací troubu přímou s
Kozák, Jiří
core