نتایج جستجو برای: free falling jets

تعداد نتایج: 546229  

Journal: :journal of water sciences research 2013
s.m razavi nabavi m shafai bejestan

rade control structures are used to control bed erosion in steep small rivers mostly in the mountains. scour downstream of this structure can lead to failure. over the past years, the effect of different variables on this phenomena have been studied, however the effect of upward seepage which is common due to head difference of the banks water table or water surface level between the upstream a...

Journal: :Water 2021

This study analyzes the air–water flow properties in overflow nappe jets. Data were measured several cross-sections of rectangular free-falling jets downstream a sharp-crested weir, with maximum fall distance 2.0 m. The obtained using conductivity phase-detection probe. Furthermore, back-flushing Pitot-Prandtl probe was used order to obtain velocity profiles. Five specific flows rates analyzed,...

Journal: :Computer Physics Communications 2011
Sebastián González Anthony R. Thornton Stefan Luding

Cluster formation is an important subject in various areas of physics. In astronomy, ice clusters are believed to aggregate into planetesimals [1], the base of what we know as planets today. In granular materials, our area of research, tiny nanoNewton forces are responsible for macroscopic clusters in free falling jets [3] – similar to the ones that appear in nano jets from plasma physics [2]. ...

M Shafai Bejestan S.M Razavi Nabavi

rade control structures are used to control bed erosion in steep small rivers mostly in the mountains. Scour downstream of this structure can lead to failure. Over the past years, the effect of different variables on this phenomena have been studied, however the effect of upward seepage which is common due to head difference of the banks water table or water surface level between the upstream a...

Journal: :آب و خاک 0
احدیان احدیان موسوی جهرمی موسوی جهرمی

abstract in the present article, effective parameters of the buoyant jets have been evaluated in the stagnant ambient fluid. the jet parameters, geometry parameters and environmental parameters are investigated. using dimensional analysis, a set of dimensionless functions was obtained. to achieve the exact functions, a physical model was built in the hydraulic laboratory of shahid chamran unive...

Journal: :civil engineering infrastructures journal 0
mitra javan 1 school of civil engineering the university of razi kermanshah, tagh bostan iran afshin eghbalzadeh school of civil engineering the university of razi kermanshah, tagh bostan iran masoud montazeri namin school of civil engineering the university of tehran tehran, 16 azar st., enghelab ave. iran

wall-jet flow is an important flow field in hydraulic engineering, and its applications include flow from the bottom outlet of dams and sluice gates. in this paper, the plane turbulent wall jet in shallow tailwater is simulated by solving the reynolds averaged navier-stokes equations using the standard  turbulence closure model. this study aims to explore the ability of a time splitting method ...

Journal: :Physical review letters 2013
A Javadi J Eggers D Bonn M Habibi N M Ribe

Thin jets of viscous fluid like honey falling from capillary nozzles can attain lengths exceeding 10 m before breaking up into droplets via the Rayleigh-Plateau (surface tension) instability. Using a combination of laboratory experiments and WKB analysis of the growth of shape perturbations on a jet being stretched by gravity, we determine how the jet's intact length l(b) depends on the flow ra...

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