Results 21 to 30 of about 7,894 (259)

Numerical investigation of air-entrainment in skimming flow over stepped spillways

Theoretical and Applied Mechanics Letters, 2016
As a widely used flood energy dissipator, the stepped spillway can significantly dissipate the kinetic or hydraulic energy due to the air-entrainment in skimming flow over the steps.
Jiemin Zhan, Jianbo Zhang, Yejun Gong
doaj   +1 more source

Hydraulic Performance of Wave-Type Flow at a Sill-Controlled Stilling Basin

Applied Sciences, 2023
Downstream of the sluice gate or weir, wave-type flows inevitably occur in stilling basins with no tailwater. This paper aims to investigate the hydraulic performance of wave-type flows at a sill-controlled stilling basin through experimental research ...
Yu Zhou, Jianhua Wu, Hai Zhao, Jianyong Hu, Fuqing Bai   +4 more
doaj   +1 more source

Air-entraining cerment and air-entrained concrete

Materiales de Construcción, 1950
No ...
openaire   +3 more sources

An Experimental Analysis of Water–Air Two-Phase Flow Pattern and Air Entrainment Rate in Self-Entrainment Venturi Nozzles

Energies, 2021
For self-entrainment venturi nozzles, the effects of nozzle shapes and operating conditions on the water–air two-phase flow pattern, and the characteristics of the air entrainment rate have been investigated.
Hyunwoo Bae, Jaeyong Sung
doaj   +1 more source

Air Entrainment and Slope Erosion During Overflow on a Levee Covered by Non-Uniform Turfgrass

Fluids
To mitigate flood damage caused by overflow from a levee, it is essential to prevent the levee failure or extend the time to breaching. Although turfgrass on a levee slope is effective in suppressing erosion, insufficient maintenance can reduce its ...
Yoshiya Igarashi, Norio Tanaka, Muhammad W. A. Junjua, Takeharu Kobori   +3 more
doaj   +1 more source

Numerical Simulation and Evaluation of Campbell Running and Gating Systems

Metals, 2020
The most common problems encountered in sand casting foundries are related to sand inclusions, air, and oxide films entrainment. These issues can be addressed to a good extent or eliminated by designing proper running systems.
Michail Papanikolaou, Emanuele Pagone, Mark Jolly, Konstantinos Salonitis   +3 more
doaj   +1 more source

Air entrainment in hydraulic engineering [PDF]

, 2004
Despite the relevance of 'white water' phenomena to hydraulic engineering, most progresses have been led by multiphase flow experts. In this paper the writer reviews the basic mechanisms of air entrainment : singular aeration and interfacial entrainment. He presents a ba-sic dimensional analysis and he discusses similitude and scale effects.
openaire   +4 more sources

In-Roll Stress Analysis Considering Air-Entrainment at the Roll-Inlet with the Effect of Grooves on Nip Roll Surface

Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2008
High-speed winding of paper web sometimes leads the winding system into unstable states, interlayer slippage of wound roll, paper breakage and so on, due to the excessive air-entrainment at the roll-inlet of nip contact region.
Masashi SASAKI, Koshi TANIMOTO, Kazukiyo KOHNO, Sadamu TAKAHASHI, Hideo KOMETANI, Hiromu HASHIMOTO   +5 more
doaj   +1 more source

Mixed‐Metal Promotion in a Manganese‐Molybdenum Oxynitride as Catalyst to Integrate C─C and C─N Coupling Reactions for the Direct Synthesis of Acetonitrile from Syngas and Ammonia

Advanced Materials, EarlyView.
Transition metal oxy/carbo‐nitrides show great promise as catalysts for sustainable processes. A Mn‐Mo mixed‐metal oxynitride attains remarkable performance for the direct synthesis of acetonitrile, an important commodity chemical, via sequential C─N and C─C coupling from syngas (C1) and ammonia (N1) feedstocks.
M. Elena Martínez‐Monje, Wilson Henao, Tania Rodenas, Patricia Concepción, Virginia Pérez Dieste, Alexander Missyul, Giovanni Agostini, Gonzalo Prieto   +7 more
wiley   +1 more source

Air‐entrainment problem in self‐compacting concrete

Journal of Civil Engineering and Management, 2009
According to the actual state of knowledge and in accordance with the PN‐EN 2006–1 norm, it is recommended to use air‐entrainment as a basic way of assuring frost‐resistance of concrete.
Janusz Szwabowski, Beata Łaźniewska-Piekarczyk   +1 more
doaj   +1 more source