Impinging jets and droplet dynamics

Author: teqi

August undefined, 2024

Witryna5 lis 2024 · In this chapter, spray cooling is reviewed from two aspects: the entire spray (spray level) and droplets (droplet level). The discussion on the spray level is focused on the spray cooling performance as a function of fluid properties, flow conditions, surface conditions, and nozzle positioning. Witryna1 lut 2024 · Deendarlianto et al. (2016) experimentally studied the interfacial dynamics of the liquid droplet impact onto surface temperatures decreasing from 500°C to 100°C with inclined angles varied at 15°,30°, and 45°, and found that the surface roughness significantly affects the quenching behavior.

Impinging Jet Dynamics

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. how does muscle turn into fat

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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) … WitrynaIn sodium-cooled fast reactors, liquid sodium leakage from piping may lead to fire accident. In the case that the liquid sodium is discharged as a liquid jet, a number of droplets are produced during liquid jet impingement on the structures; the surfaces of splashed droplets serve as a main reaction field of sodium combustion. In the present … 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... photo of kidney stones

Dynamic behavior of water droplets impinging on a heated

Witryna10 lis 2024 · The chemical composition of the droplet changes as the level of salts increases and the droplet crystallizes in a solid state. ... , where it was shown that for an impinging jet, all LES models are capable of capturing small-scale dynamics, and WALE and ... One of the advantages of using numerical methods in studying jet flow … 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 … how does muscle soreness occurWitrynathe dynamics and stability of impinging jets over a broad range of operating conditions. An improved volume-of- ... ogy, atomization, and droplet size distribution agree well with experimental how does muscles grow

"WitrynaDroplet 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 … " - Impinging jets and droplet dynamics

Impinging jets and droplet dynamics

(PDF) Recent advances in physical understanding and quantitative ...

WitrynaIn 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. Witryna14 paź 2012 · Impinging-jet injectors are widely used in liquid propulsion applications, since their simple configuration provides reliable and efficient atomization.

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Witryna16 lut 2024 · Published 16 February 2024. Physics, Engineering. We investigate experimentally the jet formed by the collapse of a cavity created by the impact of a drop on a pool of the same aqueous liquid. We show that jets can emerge with very different shapes and velocities, depending on the impact parameters, thus generating droplets … 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 …

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 … WitrynaWhen 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.

Witryna1 kwi 2024 · The characteristics of horizontally opposed water jets in the absence and presence of an impinging air jet are investigated visually with high speed camera and quantitatively using phase Doppler ... 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 …

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 …

Witryna14 paź 2011 · Abstract: In this fluid dynamics video, results from high fidelity numerical simulations are presented, which have been carried out to study the flow and droplet … how does muscular endurance increase staminaWitryna24 cze 2024 · The dynamic interaction of droplets with slippery surfaces is essential to various industrial applications, such as anti-icing, water-repellency or water … how does muscular endurance help in netballWitryna22 wrz 2024 · Dynamics of single droplets impacting on solid surfaces is a fascinating and practically important fluid mechanics phenomena [1–8].Individual droplet collision on a solid substrate is common in many technological processes such as ink–jet printing, rapid spray cooling, plasma spray coating, fuel injection, catalytic wetting, etc. … how does muscles work in pairsWitryna19 kwi 2016 · The head-on collision, merging and internal mixing dynamics of two unequal-sized droplets were experimentally studied and interpreted, using water, n … how does music affect attentionWitryna28 lis 2024 · The effect of plasma fluctuations on the in-flight droplet/particle behavior was studied by Dalir et al. [16,17,18]. It was shown that suspension penetration depth, as well as droplet/particle trajectory, temperature, and velocity, are a strong function of plasma jet fluctuations and injection properties such as injection velocity. how does muscular dystrophy progressWitryna16 paź 2012 · The predicted liquid sheet topology, atomization, and droplet size distribution agree well with experimental measurements. In this fluid dynamics video, … how does muscular contraction workWitrynaThe maximum droplet spread diameter, velocity of the rebounding jet, and the time delay between droplet impact and jet emission were characterized for Weber numbers, … how does muscular endurance help you