Impinging jets and droplet dynamics

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August undefined, 2024

Witryna30 lis 2015 · The impact of droplets on a deep pool has applications in cleaning up oil spills, spray cooling, painting, inkjet printing, and forensic analysis, relying on the changes in properties such as viscosity, interfacial tension, and density. Despite the exhaustive research on different aspects of droplet impact, it is not clear how liquid … WitrynaImpinging Jets and Droplet Dynamics. In this fluid dynamics video, results from high fidelity numerical simulations are presented, which have been carried out to study the …

Droplet dynamics under an impinging air jet Journal of Fluid ...

Witryna12 kwi 2024 · In this paper, we focus on the evolution of jets that form during the recoil of impinging drops on partially wetting hydrophilic substrates composed of cylindrical … WitrynaUnderlying processes governing droplet dynamics are investigated by analyzing the overall energy budget. In addition, an advanced visualization technique using the Ray … cities hit by tornadoes yesterday

Submillimeter-Sized Bubble Entrapment and a High-Speed Jet …

WitrynaOne aspect of previous investigations that has received modest attention is the dynamics associated with the ver- tical jet that prevails during the droplet collapse portion of the impingement process. For a narrow range of We, very thin jets with attendant high velocity have been observed. Witryna1 cze 2014 · Droplet impingement is a common phenomenon is industrial and daily life, such as spray cooling, droplet impact on the outer surface of heat transfer tube in falling film evaporators, oil drop impact on the internal wall of diesel engine combustion chamber, as well as rain-drop falling onto the ground and aircraft also involving drop … Witryna20 wrz 2024 · An experimental study was conducted to investigate the breakup of a liquid sheet produced by oblique impingement of a liquid jet on a plane solid surface. Experiments are carried out over a wide range of jet Weber number (80–6300) and various jet impingement angles (30 deg, 45 deg, and 60 deg) are employed to study … cities harris county texas

Aerospace Free Full-Text Effects of Nozzle Pressure Ratio and ...

Dynamics of an impinging jet. Part 1. The feedback phenomenon

Witryna20 kwi 2006 · In a high-speed subsonic jet impinging on a flat plate, the surface pressure fluctuations have a broad spectrum due to the turbulent nature of the high … WitrynaThe current work experimentally investigates the flowfield characteristics of an under-expanded turbulent jet impinging on a solid surface for various nozzle-to-plate distances 2.46 D j , 1.64 D j , and 0.82 D j ( D j is the jet hydraulic diameter), and nozzle pressure ratios (NPRs) ranging from 2 to 2.77 . Planar particle image velocimetry (PIV) … cities hit by tornadoes in kentuckyWitrynaIn this fluid dynamics video, Ray-tracing data visualization technique was used to obtain realistic and detailed flow motions during impinging of two liquid jets. Different patterns of sheet and rim configurations were presented to shed light into the underlying physics, including liquid chain, closed rim, open rim, unstable rim and flapping sheet. cities hit hardest by great depression

"Witryna1 lis 2024 · Impinging-jet injectors are widely used in liquid propulsion applications, since their simple configuration provides reliable and efficient atomization. The flowfield involves a series of... " - Impinging jets and droplet dynamics

Impinging jets and droplet dynamics

Numerical Investigation of Very Low Reynolds Cross Orifice Jet for ...

Witryna31 maj 2024 · Directing a jet of humid air to impinge on a surface that is cooled below the dew point results in micro-sized water droplets. Lord Rayleigh discussed the phenomenon by contrasting clean to flame-exposed glass and called such behaviour Breath Figures (BF). Historically, utilizing dew as a water source was investigated by … Witryna13 paź 2024 · The dynamic characteristics of droplets impinging on the cylinder were observed to be similar to those of droplets impinging on horizontal plates of the same …

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Witryna1 paź 2014 · Comparison between hydrodynamics of multijet atomisation with 2 and 3 impinging jets. • Drop size is closely related with azimuthal location of droplets formation. • Jet dynamics has similar influence in atomisation of 2- and 3-impinging jet sprays. • Atomizer geometry is particularly influential for 3-impinging jets sprays. • Witryna7 sty 2024 · The impact of a drop onto a stagnant deep liquid pool results in jet formation in the splashing regime. The perturbations in the free surface alter the impact conditions and change the splash dynamics. We present the simulations of the water drop impact onto a deep liquid pool with a moving free surface.

Witryna22 maj 2012 · The maximum droplet spread diameter, velocity of the rebounding jet, and the time delay between droplet impact and jet emission were characterized for Weber numbers, We, based on droplet impact speed and diameter, up to 500. The unequal shear stresses and contact angles influence the maximum spread diameters in the … Witryna16 paź 2012 · The predicted liquid sheet topology, atomization, and droplet size distribution agree well with experimental measurements. In this fluid dynamics video, …

WitrynaRecent experiments by Hooshanginejad et al. (J. Fluid Mech., vol. 901, 2024) revealed that a millimetric partially wetting water droplet under an impinging jet can oscillate in place, split or depin away from the jet, depending on the … Witryna12 kwi 2024 · Mallory and P. E. Sojka, “ On the primary atomization of non-Newtonian impinging jets: Volume I experimental investigation,” Atomization Sprays 24(5), 431 ... Dynamics of a droplet impacting a thin film on a glass substrate: (a) impacting droplet, (b) spreading of the droplet, (c) initiation of the crown, (d) radial and axial growth of …

Witrynadroplet dynamics of liquid sheets formed by two impinging jets. A three-dimensional Volume-of-Fluid (VOF) method with adaptive mesh re nement (AMR) based on octree …

Witryna25 lip 2024 · one-way coupling of the e xter nal pressure from the impinging jet on the droplet, which allows us to treat the jet pr oﬁle as steady and independent of the … cities graphicWitrynaDroplet dynamics under an impinging air jet Partially wetting droplets under an airflow can exhibit complex behaviours that arise from the coupling of surface tension, inertia … diarrhea from dish detergent residueWitryna1 cze 2024 · Typical outcomes of an impinging droplet on a solid surface a Deposition indicates that the droplet deforms and stays attached to the surface. b Prompt splash is characterised by the generation of ... diarrhea from chemoWitrynaIn this fluid dynamics video, Ray-tracing data visualization technique was used to obtain realistic and detailed flow motions during impinging of two liquid jets. Different … cities hope to discoverWitrynaImpinging Jets and Droplet Dynamics. 18,988 views. Oct 18, 2011. 140 Dislike Share Save. Xiaodong Chen. 247 subscribers. Video from "Impinging Jets and Droplet … diarrhea from chemo treatmentWitryna24 cze 2024 · The dynamic interaction of droplets with slippery surfaces is essential to various industrial applications, such as anti-icing, water-repellency or water … diarrhea from chemo and radiationWitrynaWhen a droplet impacts a solid surface, the entrapment of a submillimeter-sized bubble and the emission of a high speed jet can be observed at low impact velocities. In this work, we show that bubble entrapment occurs only on sufficiently hydrophobic surfaces within a narrow range of impact velocities. cities highest murder rate 2021