Results 91 to 100 of about 1,824,087 (309)

Occurrence of severe slugging in oil production lines and mitigation methods: A numerical simulation approach using ALFAsim®

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract Severe slugging represents a major challenge in offshore production systems, potentially compromising operational stability and the integrity of installations. Although established simulators such as OLGA® are widely used for its analysis, there is a gap in the literature regarding the application of the one‐dimensional simulator ALFAsim® for ...
Wayne Gabriel Nóbrega Firme, Tony Herbert Freire de Andrade, Phillipe Augusto Sales, Ricardo Soares Gomez, João Alves de Lima   +4 more
wiley   +1 more source

Unsteady aerodynamic force on a knuckleball in soccer

Procedia Engineering, 2010
AbstractThe purpose of this study is to analyze the fluid mechanics and frequency of forces acting on a knuckleball, specifically a soccer ball that was kicked and was in flight, was visualized using a smoke agent (titanium tetrachloride), and its unsteady aerodynamics were investigated. In the case of the knuckleball, the peak value of the vortex lift
Hong, Sungchan, Chung, Chulsoo, Nakayama, Masao, Asai, Takeshi   +3 more
openaire   +1 more source

Opsoclonus in Pediatric Patients: Differential Diagnosis and a Practical Approach to Evaluation

Annals of the Child Neurology Society, EarlyView.
ABSTRACT Opsoclonus is an ocular dyskinesia characterized by involuntary, arrhythmic, multidirectional saccades. In pediatrics, opsoclonus is most commonly attributed to the rare neuroinflammatory disorder opsoclonus‐myoclonus‐ataxia syndrome (OMAS), typically considered a paraneoplastic syndrome associated with neural crest tumors. However, opsoclonus
Aubrey C. Reed, Supreet S. Randhawa, Jason H. Peragallo, Prabhumallikarjun Patil, Grace Gombolay, Varun Kannan   +5 more
wiley   +1 more source

Acoustic‐driven surface cleaning with millimeter‐sized bubbles at translational resonance

Droplet, EarlyView.
Time‐lapse visualization comparing bubble trajectories. The top panel (0 Hz) shows a bubble's linear path under no acoustic forcing, while the bottom panel (50 Hz) demonstrates the oscillatory motion induced by acoustic waves at a resonance mode. This mechanism holds promising potential for applications such as surface cleaning.
Yan Jun Lin, Zhengyang Liu, Sunghwan Jung   +2 more
wiley   +1 more source

Dynamics and Control of Forced-Unsteady-State Catalytic Combustors [PDF]

, 2002
The dynamic behaviour of the reverse flow reactor and of the network of combustors, with periodic variation of the feed position, has been investigated: the destruction of lean waste gas emissions has been considered. In the reverse flow reactor larger emissions occur at each feed switch, caused by wash out; in addition, temporary decrease of ...
VANNI, Marco, BARRESI, Antonello
openaire   +2 more sources

An assessment of stress and production rate of sucker rod heat pipes in oil well pumping system

Deep Underground Science and Engineering, EarlyView.
The sucker rod pumping system is the preferred oil extraction technique. The concept about equipping the hollow vacuum space in solid sucker rods with heat pipe has been scrutinized in terms of stress and oil production evaluation. Abstract The implementation of the heat pipe concept in sucker rods for oil pumping systems negates the requirement for an
R. S. Anand, Ang Li, Wenbo Huang, Juanwen Chen, Qingshan Ma, Fangming Jiang   +5 more
wiley   +1 more source

The damage and failure mechanism of prestatically loaded rock during medium‐strain rate cyclic impact loading

Deep Underground Science and Engineering, EarlyView.
Based on experimental results and theoretical analysis, an established rock damage accumulation model that comprehensively considers the preapplied static load, impact peak value, impact frequency, and impact times. Abstract To study the rock damage mechanism under high static loading and superimposed medium strain rate cyclic impact loading, a series ...
Wei Wang, Hanpeng Wang, Zicheng Wang, Xinyuan Xie, Yunhao Wu, Jinhou Zhang, Dekang Sun   +6 more
wiley   +1 more source

Performance assessment of a potential underground thermal storage facility: Case study of the closed mine Prosper‐Haniel in the Ruhr coal mining area in Germany

Deep Underground Science and Engineering, EarlyView.
This study demonstrates the feasibility of an underground closed‐loop thermal storage facility at a post‐mining site, intended for seasonal heat energy storage. Its principal design shows water flow directions in winter and summer (1, 2), heat pumps (3), an upper water reservoir (4), and connecting pipes (5).
Dmytro Rudakov, Oleksandr Inkin
wiley   +1 more source

Force Generation Mechanisms by an Insect Wing in an Idealized Hovering Motion

Journal of Applied Fluid Mechanics, 2017
An Unsteady force generation mechanisms (delayed stall, wake capture and rotational lift) during idealized hovering of insect flight at Reynolds number (Re) of 136 have been identified in this research. Dependence of flow physics on Re forms the basis of
H. R. Hamdani, Ahmad Aizaz, Ali Naqvi
doaj  

Vertical Vibration Model for Unsteady Lubrication in Rolls-Strip Interface of Cold Rolling Mills

Advances in Mechanical Engineering, 2012
According to the vertical vibration phenomena existing in cold rolling mills, the unsteady lubrication mechanism in roll gap and its influence to rolling stability was chosen as the case for analysis.
Xu Yang, Qing Li, Chao-nan Tong, Qi-han Liu   +3 more
doaj   +1 more source