Results 31 to 40 of about 2,559 (287)

Investigating skimming flow conditions over stepped spillways using particle image velocimetry [PDF]

open access: yes, 2020
Turbulent flow over stepped spillways can be considered the most significant flow that can cause severe problems at the downstream side, near the toe of the structure, such as sediment erosion which normally occurs due to the high amount of water energy.
Jose Horrillo-Caraballo   +2 more
core   +1 more source

Modelling atmospheric dry deposition in urban areas using an urban canopy approach [PDF]

open access: yesGeoscientific Model Development, 2015
Atmospheric dry deposition is typically modelled using an average roughness length, which depends on land use. This classical roughness-length approach cannot account for the spatial variability of dry deposition in complex settings such as urban ...
N. Cherin   +3 more
doaj   +1 more source

Validation of the Computational ANSYS -CFX code for Free Surface Flow: Skimming Flow over Non-Uniform Step Size Stepped Spillways

open access: yesZanco Journal of Pure and Applied Sciences, 2019
DOI: https://doi.org/ Keywords: Abstract Stepped cascades have obtained much attentiveness by engineers in hydraulic field from multiple sides as its high production in losing energy and simplicity of construction, mostly after spreading of RCC in ...
Shawnm Mudhafar Saleh, Sarhang M. Husain
doaj   +1 more source

Aeration characteristics for skimming flow along the pre-aerator stepped spillways

open access: yesShui kexue jinzhan, 2014
Pre-aerator stepped spillways,where the aerator is placed prior to the primary step in the stepped spillway,can form a cavity chamber at the bottom to produce enough aeration concentration to avoid the cavitation erosion.
LIU Shanjun   +5 more
doaj   +1 more source

Investigation of the effects of some processing conditions on the fate of oxytetracycline and tylosin antibiotics in the making of commonly consumed cheeses from the East Mediterranean [PDF]

open access: yesVeterinary World, 2021
Background and Aim: Transfer of antibiotics from raw milk to derived products is directly related to the processes involved in the manufacturing of dairy products, including East Mediterranean cheeses, since these have particular flow diagrams of ...
Hussein F. Hassan   +8 more
doaj   +1 more source

Distribution of Pressures on Modified Stepped Spillway by Using Toothed-Steps [PDF]

open access: yesEngineering and Technology Journal, 2021
In the present study a new steeped spillway shape at which “toothed steps” have been adopted instead of traditional steps to enhance the amount and distribution of water pressure along the chute of the stepped spillway. Experiments were conducted under a
Jaafar Maatooq, Ameer Jasim
doaj   +1 more source

Standing waves of the stepped dropshaft in a deep tunnel stormwater system

open access: yesWater Science and Technology, 2023
The deep tunnel stormwater system, consisting of dropshafts and underground tunnels, is used to alleviate or prevent urban water problems associated with extreme rainfall events. The stepped dropshaft can transport surface runoff to the tunnels with high
Jingkang Sun   +4 more
doaj   +1 more source

Phylogenomic analyses reveal intractable evolutionary history of a temperate bamboo genus (Poaceae: Bambusoideae)

open access: yesPlant Diversity, 2019
Shibataea is a genus of temperate bamboos (Poaceae: Bambusoideae) endemic to China, but little is known about its phylogenetic position and interspecific relationships.
Cen Guo, Zhen-Hua Guo, De-Zhu Li
doaj   +1 more source

Numerical simulation of flow on circular crested stepped spillway

open access: yesApplied Water Science, 2022
The spillways are one of the most important hydraulic structures used in river engineering, dam construction, irrigation, and drainage engineering projects. Recently, a new type of such spillways with a circular crest has been proposed.
Abbas Parsaie   +4 more
doaj   +1 more source

Effects of Inclination Angles on Stepped Chute Flows

open access: yesApplied Sciences, 2020
Owing to its effective energy dissipation and aeration, a stepped spillway is commonly used for flood release in hydraulic projects. Its conventional design features horizontal step surfaces.
Shicheng Li, James Yang
doaj   +1 more source

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