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The influence of mouth opening on pharyngeal pressure loss and its underlying mechanism: A computational fluid dynamic analysis [PDF]
Frontiers in Bioengineering and Biotechnology, 2023 Objective: During inspiration, mechanical energy generated from respiratory muscle produces a negative pressure gradient to fulfill enough pulmonary ventilation.
Bin Hu +8 more
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PHPA as a Frictional Pressure Loss Reducer and Its Pressure Loss Estimation [PDF]
Petroleum Science and Technology, 2009 Abstract Significant circulating system pressure losses occur between mud and extreme long drill pipes during deep or ultra deep offshore drilling operations with the available fluid circulation technology. Therefore high pump horsepower is required to circulate the mud.
C. Ercan, M. E. Ozbayoglu
openaire +3 more sources
Influence of the excavator hydraulic system efficiency on the productivity
Research in Agricultural Engineering, 2023 This paper presents the experimental research of factors influencing the UDS 214 excavator efficiency. The hydraulic oil flow rate is measured in hydraulic circuits for controlling the moving of the bucket of the UDS 214 excavator.
Michal Jůza, Petr Heřmánek
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Numerical Modelling of the 3D Unsteady Flow of an Inlet Particle Separator for Turboshaft Engines
International Journal of Turbomachinery, Propulsion and Power, 2023 Helicopter and turboprop engines are susceptible to the ingestion of debris and other foreign objects, especially during take-off, landing, and hover. To avoid deleterious effects, filters such as Inlet Particle Separators (IPS) can be installed. However,
Marco Castaldi +3 more
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Effect of the Nozzle Geometry on Flow Field and Heat Transfer in Annular Jet Impingement
Energies, 2022 The effects of nozzle shape modifications on the flow phenomena and heat transfer characteristics in annular jet impingement are investigated numerically.
Ying Zhong, Chao Zhou, Yipeng Shi
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Energies, 2022 Triply periodic minimal surfaces (TPMS) have shown better mechanical performance, mass transfer, and thermal conductivity than conventional and strut-based structures, which have been employed in different disciplines. Most of the literature investigates
Kirttayoth Yeranee, Yu Rao
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Pressure Losses in Hydraulic Manifolds [PDF]
Energies, 2017 Hydraulic manifolds are used to realize compact circuit layout, but may introduce a high pressure drop in the system. Their design is in fact oriented more toward achieving minimum size and weight than to reducing pressure losses. This work studies the pressure losses in hydraulic manifolds using different methods: Computational Fluid Dynamic (CFD ...
ZARDIN, Barbara +4 more
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Fluid Flow in Helically Coiled Pipes
Fluids, 2023 Helically coiled pipes are widely used in many industrial and engineering applications because of their compactness, larger heat transfer area per unit volume and higher efficiency in heat and mass transfer compared to other pipe geometries.
Leonardo Di G. Sigalotti +2 more
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Tempus Fugit: Time Pressure in Risky Decisions [PDF]
, 2011 We study the effects of time pressure on risky decisions for pure gain prospects, pure loss prospects, and mixed prospects involving both gains and losses.
Kocher, Martin G. +2 more
core +5 more sources
Applied Sciences, 2021 Dissipative splitter silencers are widely used in industry for the reduction of propagated sound waves in ducts. Even though these systems are effective from the acoustics point of view when they are properly designed, they also introduce a pressure loss
Bartosz Chmielewski +2 more
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