Results 51 to 60 of about 79,589 (237)
On the Effect of Block Roughness in Ogee Spillways with Flip Buckets
Fluids, 2020 In this study, the effect of the presence of bed-block roughness in an ogee spillway on energy dissipation and jet length is investigated. A series of experimental and numerical tests were conducted using an ogee spillway with block roughness on the bed ...
Rasoul Daneshfaraz +3 more
doaj +1 more source
Continuous measurements of discharge from a horizontal acoustic Doppler current profiler in a tidal river [PDF]
, 2009 Acoustic Doppler current profilers (ADCPs) can be mounted horizontally at a river bank, yielding single-depth horizontal array observations of velocity across the river.
Buschman, F.A. +2 more
core +2 more sources
Aerodynamic roughness of fixed sandy beds [PDF]
Journal of Geophysical Research: Solid Earth, 2001 The nature of interactions between surface winds and sand surfaces that can be characterized by aerodynamic roughness length has important implications for aeolian sediment transport. Here we report the wind tunnel results of systematic tests of the aerodynamic roughness lengths of different sized fixed sand beds at different free‐stream wind ...
Zhibao Dong +4 more
openaire +1 more source
Application of Raman and Photoluminescence Spectroscopy to MgO‐C Refractories
Advanced Engineering Materials, EarlyView.Visible to near infrared luminescence of MgO is studied on MgO‐C bricks and nominally pure MgO powder, with focus on two similar sharp high‐intensity signals, at 699 and 871 nm, each surrounded by symmetrical sidebands. The nature of these sidebands is investigated by temperature‐dependent spectroscopic measurements, confirming phonon involvement by ...
Julia Richter +5 more
wiley +1 more source
Advanced Engineering Materials, EarlyView.This study demonstrates how optimizing laser power, scanning speed, and hatching distance in laser powder bed fusion can boost the productivity of Inconel 718 manufacturing by up to 29% while maintaining mechanical integrity. The work delivers a validated process window and cost–time analysis, offering industry‐ready guidelines for efficient additive ...
Amir Behjat +7 more
wiley +1 more source
Relative role of bed roughness change and bed erosion on peak discharge increase in hyperconcentrated floods [PDF]
Advances in Geosciences, 2014 River floods are usually featured by a downstream flattening discharge peak whereas a downstream increasing discharge peak is observed at a rate exceeding the tributary discharge during highly silt-laden floods (hyperconcentrated floods) in China's ...
W. Li +4 more
doaj +1 more source
Friction dependence of shallow granular flows from discrete particle simulations [PDF]
, 2011 A shallow-layer model for granular flows is completed with a closure relation for the macroscopic bed friction or basal roughness obtained from micro-scale discrete particle simulations of steady flows. We systematically vary the bed friction by changing
Bokhove, Onno +3 more
core +2 more sources
Coherent structures in oscillatory flows within the laminar-to-turbulent transition regime for smooth and rough walls [PDF]
, 2016 This is an Accepted Manuscript of an article published by Taylor & Francis Group in [Journal of hydraulic research] on [2016], available online at: http://www.tandfonline.com/10.1080/00221686.2016.1174960We investigate coherent structures present in ...
Bateman Pinzón, Allen +3 more
core +3 more sources
Advanced Engineering Materials, EarlyView.This paper presents a novel approach to reducing oxide layers on metal powders using low‐temperature hydrogen dielectric barrier discharge plasmas at atmospheric pressure. Unlike conventional hydrogen‐plasma reductions, the powders do not contact the plasma directly.
Shukang Zhang +3 more
wiley +1 more source
Numerical Study of the Rough Bed Impact on Energy Dissipation and Cavitation on Chute Spillways
علوم آب و خاک, 2022 Using a rough bed for spillway compare to common dissipation methods such as stilling basins, stepped spillways, ski jumps, and bed elements may be more efficient to boost energy dissipation.
H. Noury Hasanabady +3 more
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