Droplet breakup and coalescence of an internal-mixing twin-fluid spray

Wu, Hao; Zhang, Fujun; Zhang, Zhenyu

doi:10.1063/5.0030777

Cited by 71 publications

(12 citation statements)

References 50 publications

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“…The above analysis shows that the Reynolds number of the gas-phase flow in the air-assisted spray field is large than 50,000, so it can be inferred that the droplets in the spray may further disintegrate due to surrounding turbulent air flow. Based on the simplified droplet collision description method proposed by Wu et al [19], we conduct a comparative study on air-assisted spray droplet collisions under different GLR conditions. For a brief introduce here, it is assumed that the droplet collision only occurs in the form of head-on between two adjacent droplets captured in sequence when the velocity of the front droplet is lower than that of the droplet chasing behind.…”

Section: Resultsmentioning

confidence: 99%

Atomization and Droplet Dynamics Analysis of Air-assisted Spray under Different Gas-liquid Ratios

Zhang

Wei

et al. 2021

ICLASS

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The principal objective of the present work is to experimentally investigate the droplet behavior of air-assisted spray. Simultaneous measurements of droplet sizes and velocities were made by phase-Doppler particle analyzer with particular emphasis on droplet size distribution, gas-droplet interactions and droplet collision. The experimental results show that air-assisted spray is composed of bulk of tiny droplets entrained by high-speed air flow. The calculated Stokes numbers of selected tracer droplets with diameter less than 5 μm show that these droplets follow the air flow faithfully and thus can be used to estimate the local air flow velocity. The Reynolds number of local gas phase was found to be larger than the order of 10 4 . The analysis of the disintegration of discrete droplets indicates that the sampled droplets basically will not undergo shear breakup, but there is a possibility of turbulent breakup

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Section: Resultsmentioning

confidence: 99%

Atomization and Droplet Dynamics Analysis of Air-assisted Spray under Different Gas-liquid Ratios

Zhang

Wei

et al. 2021

ICLASS

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“…The fluid was assumed laminar, Newtonian, and in-compressible. The conservation equations for mass and momentum describing the flow features are given as follows [42][43][44][45][46][47][48][49][50][51] :…”

Section: Governing Equations For Flow Channel Domainmentioning

confidence: 99%

CFD Simulation of He/CH4 Separation by Hyflon AD60X Membrane

Amini

Ghaednian-Jahromi

Karimi-Sabet

et al. 2022

Chemical and Biochemical Engineering Quarterly

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In this research, the membrane separation process was used to separate helium from methane gas. In order to do this, computational fluid dynamics (CFD) was used, and the effect of process parameters on the performance of the membrane separation process was studied by this method. To simulate the hydrodynamics of flow in the channel, the Navier-Stokes equation was used, and the Maxwell-Stefan equation was applied to simulate the mass transfer phenomenon. In addition, Fick's law was utilized to simulate mass transfer in the membrane domain. The impacts of significant parameters such as feed pressure, feed flow rate, and feed concentration on parameters such as He/CH 4 separation factor, methane and helium membrane flux and helium mole fraction in permeate stream were studied. The results of the simulation indicated that the feed pressure of 10 bar, feed flow rate of 120 cm 3 min -1 , and feed mole fraction of 0.0254 had the best membrane performance in He/CH 4 separation.

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“…From the establishment of mathematical models for theoretical studies [17][18][19][20][21][22][23][24][25] to quantitative analysis by high-precision experiments [26][27][28][29], the methods researchers use to solve scientific problems are constantly advanced. At the same time, the advancement of science and technology and the increasing sophistication of CFD technology [30] have brought great changes to the research methods of impinging jets.…”

Section: Introductionmentioning

confidence: 99%

A Numerical Study of a Submerged Water Jet Impinging on a Stationary Wall

Wang

Liu³

et al. 2022

JMSE

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The impinging jet is a classical flow model with relatively simple geometric boundary conditions, and it is widely used in marine engineering. In recent years, scholars have conducted more and more fundamental studies on impact jets, but most of the classical turbulence models are used in numerical simulations, and the accuracy of their calculation results is still a problem in regions with large changes in velocity gradients such as the impact zone. In order to study the complex flow characteristics of the water flow under the condition of a submerged jet impacting a stationary wall, the Wray–Agarwal turbulence model was chosen for the Computational Fluid Dynamics (CFD) numerical simulation study of the impacting jet. Continuous jets with different Reynolds numbers and different impact heights H/D were used to impact the stationary wall, and the results show that the jet flow structure depends on the impact height and is relatively independent of the Reynolds number. With the increase in the impact height, the diffusion of the jet reaching the impact area gradually increases, and its velocity gradually decreases. As the impact height increases, the maximum pressure coefficient decreases and the rate of decrease increases gradually, and the dimensionless pressure distribution is almost constant. In this paper, the flow field structure and pressure characteristics of a continuous submerged jet impacting a stationary wall are explored in depth, which is of great guidance to engineering practice.

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Droplet breakup and coalescence of an internal-mixing twin-fluid spray

Cited by 71 publications

References 50 publications

Atomization and Droplet Dynamics Analysis of Air-assisted Spray under Different Gas-liquid Ratios

Atomization and Droplet Dynamics Analysis of Air-assisted Spray under Different Gas-liquid Ratios

CFD Simulation of He/CH4 Separation by Hyflon AD60X Membrane

A Numerical Study of a Submerged Water Jet Impinging on a Stationary Wall

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