Results 111 to 120 of about 22,970 (166)

Evaluation of a Young Dog for Escalating Aggression Toward Both Familiar and Unfamiliar People. [PDF]

Case Rep Vet Med
Honeckman L.
europepmc   +1 more source

Dust Generation From Aggregate Comminution During Transport in a Laboratory Wind Tunnel. [PDF]

J Geophys Res Atmos
McKenna Neuman C, Saarenvirta G, O'Brien P.   +2 more
europepmc   +1 more source

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Near-bed particle motion over transitionally-rough bed

Journal of Hydraulic Research/De Recherches Hydrauliques, 2011
The motion of sediment particles over a transitionally-rough bed is studied experimentally using a real-time high-speed imaging system. Vertical distributions of the instantaneous flow velocities were measured using acoustic Doppler velocimetry. The sediment saltation trajectories and the associated velocity components were deciphered from the high ...
Krishnan Murugesan, Umesh C Kothyari
exaly   +2 more sources

Hydraulic Jumps on Rough Beds

Journal of Hydraulic Engineering, 2007
This paper presents the results of an experimental investigation on the hydraulic jump on horizontal rough beds. Experiments were carried out to study the effect of bed roughness on both the sequent depth ratio and the roller length. The investigation allowed the writers to positively test the reliability of a new solution of the momentum equation for ...
CAROLLO, Francesco Giuseppe, FERRO, Vito, PAMPALONE, Vincenzo   +2 more
openaire   +2 more sources

Numerical Investigation of Natural Rough-Bed Flow

2020
The turbulent flow in natural rough-bed watercourses is a rather complex phenomenon, still poorly investigated. The majority of the existing works on this subject is of experimental nature, while the numerical ones are mostly related to artificially and regularly-roughened beds. In the present work a numerical investigation is carried out, in which the
ALFONSI G., FERRARO D., LAURIA A., GAUDIO R.   +3 more
openaire   +3 more sources

Velocity Distribution in the Roughness Layer of Rough-Bed Flows

Journal of Hydraulic Engineering, 2004
Several models for the vertical distribution of the double-averaged (in time and in the plane parallel to the mean bed) longitudinal velocity in the flow region between roughness troughs and roughness tops are suggested. We found that the same model for velocity distribution may be applicable to a range of flow conditions and roughness types, which ...
Vladimir Nikora, Katinka Koll, Ian McEwan, Stephen McLean, Andreas Dittrich   +4 more
openaire   +1 more source

Aerodynamic roughness length of sandy beds and gravel beds

Environmental Earth Sciences, 2012
A physical model was developed for the aerodynamic roughness length of gravel beds and sandy beds under different atmospheric stability conditions based on Monin–Obukhov similarity theory and dimensional analysis. The relationship between the roughness length, the properties of the roughness elements, the characteristics of the airflow, and an ...
Ping Lv, Zhibao Dong
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Equivalent Roughness of Alluvial Bed

Journal of the Hydraulics Division, 1982
The eguivalent roughness of a movable bed is considered. Relationships are given which can be used to determine the equivalent bed roughness from the bed material size and the bed-form dimensions. In the case of a plane bed the equivalent roughness is related to the D 9 0 of the bed material.
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