Modeling of non-Newtonian suspension plasma spraying in an inductively coupled plasma torch

Qian, Lijuan; Lin, Jianzhong; Xiong, Hongbing

doi:10.1016/j.ijthermalsci.2011.03.024

Cited by 13 publications

(12 citation statements)

References 28 publications

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“…Without considering secondary atomization, these models could not account for the spray evolution along the downstream of the exit orifice, which is critical to the engineering applications of atomization sprays. Lin and his co-workers [27][28][29][30][31][32][33][34][35][36] proposed a three-dimensional model to predict the droplet mean size and other spray characteristics by describing both primary and secondary atomizations [27][28][29]. They described the breakup mechanisms for both Newtonian fluid and non-Newtonian fluid by different primary atomization models [30,31], discussing the characteristics of impinging spray field in detail and indicated the proper plate distance [32,33].…”

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confidence: 99%

“…Lin and his co-workers [27][28][29][30][31][32][33][34][35][36] proposed a three-dimensional model to predict the droplet mean size and other spray characteristics by describing both primary and secondary atomizations [27][28][29]. They described the breakup mechanisms for both Newtonian fluid and non-Newtonian fluid by different primary atomization models [30,31], discussing the characteristics of impinging spray field in detail and indicated the proper plate distance [32,33]. They also studied the evolution of droplets mean diameter along the axial distance, the mean size and statistical distribution of atomized droplets at cross sections, as well as calculating and analyzing the change of droplet velocity and to reveal their inner driving force [27][28][29]31].…”

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confidence: 99%

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Modeling on effervescent atomization: A review

Qian

Lin

2011

Sci. China Phys. Mech. Astron.

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The study and modeling process of effervescent atomization are reviewed. The mechanism of droplet events and the treatment of liquid fragmentation process and dispersed particles are systematically presented, which includes the primary atomization of Newtonian and non-Newtonian fluid, instability analysis, turbulence treatment, particle tracking, secondary atomization and droplets collision. The review on the sub-models involved in the simulation of effervescence is followed by a summary of the achievements of modeling. First is the validation of models; then the parametric study is summarized; the third part introduces the fitting formula of droplet mean size and impinging factors, and finally the scope of future study is indicated. effervescent atomization spray, modeling, review PACS: 47.55.Ca, 47.55.df, 47.60.Kz ALR air-to-liquid ratio, by mass C D drag coefficient D noz nozzle diameter, m d d the droplet diameter, m e internal energy, J F force, N g gravity force, N k turbulent kinetic energy per unit mass k bu breakup frequency, s 1 k  wave number m  mass flow rate, kg/s m mass, kg p pressure kg s 2 /m Q heat source, J q heat flux vector r droplet radius, m Re Reynolds number Sr nterface velocity slip ratio SMD Sauter mean diameter, m U rel relative velocity vector, m/s u, v, w velocity, m/s x radial coordinate, m y axial coordinate, m Greek symbols  volume fraction of gas  deformation parameter  dynamic viscosity, kg/ms  density, kg/m 3  surface tension, kg/m 2  thickness sheet, m  growth rate  viscous dissipation rate, J/ms  distance between the center of one drop and U rel , m  drop oscillation frequency, /s  viscous shear stress tensor Subscript cr criteria g gas l liquid

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confidence: 99%

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Modeling on effervescent atomization: A review

Qian

Lin

2011

Sci. China Phys. Mech. Astron.

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“…ere are a large number of techniques for the preparations of ultrafine particles [4]. Among them, spray technology using suspension or solution precursors has been most widely used [5].…”

Section: Introductionmentioning

confidence: 99%

A New Spray Approach to Produce Uniform Ultrafine Coatings

Qian

Song

2018

Journal of Nanotechnology

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A new spray approach is proposed to overcome the disadvantages of the traditional single-orifice nozzle, such as uneven coatings, overspray, and low efficiency. Both the experimental measurements and numerical simulation are used to investigate the spray characteristics of the multiorifice nozzle. e results show the new nozzle structure is able to disperse the particles in a wider regime and reduce the central pressure. It is an effective way to produce uniform ultrafine coatings.

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“…Twin-fluid atomizers can be found in various industrial applications such as internal combustion and gas turbine engines [1], process industry [2], spray coating [3], fire suppression [4] or food process engineering and spray drying [5].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Y-jet and OIL effervescent atomizers based on internal and external two-phase flow characteristics

Mlkvik

Zaremba²,

Jedelský³

et al. 2016

EPJ Web of Conferences

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Abstract. Presented paper focuses on spraying of two viscous liquids (ȝ = 60 and 143 mPa·s) by two types of twinfluid atomizers with internal mixing. We compared the well-known Y-jet atomizer with the less known, "outside in liquid" (OIL), configuration of the effervescent atomizer. The required liquid viscosity was achieved by using the water-maltodextrin solutions of different concentrations. Both the liquids were sprayed at two gas inlet pressures (ǻp = 0.14 and 0.28 MPa) and various gas-to-liquid ratios (GLR = 2.5%, 5%, 10% and 20%). The comparison was focused on four characteristics: liquid flow-rate (for the same working regimes, defined by ǻp and GLR), internal flow regimes, Weber numbers of a liquid breakup (We) and droplet sizes. A high-speed camera and Malvern Spraytec laser diffraction system were used to obtain necessary experimental data. Comparing the results of our experiments, we can state that for both the liquids the OIL atomizer reached higher liquid flow-rates at corresponding working regimes, it was typical by annular internal flow and higher We in the near-nozzle region at all the working regimes. As a result, it produced considerably smaller droplets than the second tested atomizing device, especially for GLR < 10%.

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Modeling of non-Newtonian suspension plasma spraying in an inductively coupled plasma torch

Cited by 13 publications

References 28 publications

Modeling on effervescent atomization: A review

Modeling on effervescent atomization: A review

A New Spray Approach to Produce Uniform Ultrafine Coatings

Comparison of Y-jet and OIL effervescent atomizers based on internal and external two-phase flow characteristics

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