Atomization characteristics on the surface of a round liquid jet

Mayer, W.; Branam, Richard

doi:10.1007/s00348-003-0675-0

Cited by 56 publications

(28 citation statements)

References 15 publications

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“…He conducted a temporal linear stability analysis for an inviscid cylindrical liquid jet moving in vacuum. The results showed that only axisymmetric disturbances can grow and dominate the breakup of a jet, which unfortunately did not agree with the experiments [6][7][8], which indicated that in special situations non-axisymmetric disturbances can prevail over axisymmetric disturbances. Weber [9] implemented the study of a viscous liquid jet surrounded by an inviscid gas medium, which gave a detailed description of the instability of a Newtonian liquid jet.…”

Section: Introductioncontrasting

confidence: 50%

Linear stability analysis of a three-dimensional viscoelastic liquid jet surrounded by a swirling air stream

Yang

Tong

2013

Journal of Non-Newtonian Fluid Mechanics

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Section: Introductioncontrasting

confidence: 50%

Linear stability analysis of a three-dimensional viscoelastic liquid jet surrounded by a swirling air stream

Yang

Tong

2013

Journal of Non-Newtonian Fluid Mechanics

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“…< 100. Mayer and Branam [198] found a criterion for the superpulsating mode identical to the mentioned correlation [197] but with an exponent for equal to −0.4 instead of −0.5. Lasheras et al [199] observed the digitations-type breakup regime that was not described by Farago and Chigier [197].…”

Section: Coaxial Jetsmentioning

confidence: 99%

A Comprehensive Review on Fluid Dynamics and Transport of Suspension/Liquid Droplets and Particles in High-Velocity Oxygen-Fuel (HVOF) Thermal Spray

2015

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Abstract:In thermal spraying processes, molten, semi-molten, or solid particles, which are sufficiently fast in a stream of gas, are deposited on a substrate. These particles can plastically deform while impacting on the substrate, which results in the formation of well-adhered and dense coatings. Clearly, particles in flight conditions, such as velocity, trajectory, temperature, and melting state, have enormous influence on the coating properties and should be well understood to control and improve the coating quality. The focus of this study is on the high velocity oxygen fuel (HVOF) spraying and high velocity suspension flame spraying (HVSFS) techniques, which are widely used in academia and industry to generate different types of coatings. Extensive numerical and experimental studies were carried out and are still in progress to estimate the particle in-flight behavior in thermal spray processes. In this review paper, the fundamental phenomena involved in the mentioned thermal spray techniques, such as shock diamonds, combustion, primary atomization, secondary atomization, etc., are discussed comprehensively. In addition, the basic aspects and emerging trends in simulation of thermal spray processes are reviewed. The numerical approaches such as Eulerian-Lagrangian and volume of fluid along with their advantages and disadvantages are explained in detail. Furthermore, this article provides a detailed review on simulation studies published to date. OPEN ACCESSCoatings 2015, 5 577

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“…Indeed, the liquid viscosity may influence droplet deformation and secondary breakup by the fact that shear stresses continuously act at the droplet surface, comprising competition between the disruptive and adhesive, resp., conservative forces for each particular droplet along with the downstream distance, Cohen [3]. Experimental results on the structure of the breakup of liquid jets are reported by Faeth et al [6], Hsiang et al [8], Mayer et al [13], O'Neill et al [14], Varga et al [22], and Wierzba [26]. Unanimously, the breakup of liquid droplets in a turbulent air stream is attributed to disturbances at the surface of the liquid droplet, which is induced by the shear force.…”

Section: Introductionmentioning

confidence: 85%

Mean Droplet Size and Local Velocity in Horizontal Isothermal Free Jets of Air and Water, respectively, Viscous Liquid in Quiescent Ambient Air

2006

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Measurements using two-dimensional Phase Doppler Anemometry as well as high speed cinematography in free jets at several nozzle exit pressures and mass flow rates, show that the Sauter mean droplet diameter decreases with increasing air and liquid-phase mass flow ratio due to the increase of the air stream impact on the liquid phase. This leads to substantial liquid fragmentation, respectively primary droplet breakup, and hence, satellite droplet formation with small sizes. This trend is also significant in the case of a liquid viscosity higher than that of water. The increased liquid viscosity stabilizes the droplet formation and breakup by reducing the rate of surface perturbations and consequently droplet distortions, ultimately also leading, in total, to the formation of smaller droplets. The droplet velocity decreases with the nozzle downstream distance, basically due to the continual air entrainment and due to the collisions between the droplets. The droplet collisions may induce further liquid fragmentation and, hence, formation of a number of relatively smaller droplets respectively secondary breakup, or may induce agglomeration to comparatively larger liquid fragments that may rain out of the free jet.

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Atomization characteristics on the surface of a round liquid jet

Cited by 56 publications

References 15 publications

Linear stability analysis of a three-dimensional viscoelastic liquid jet surrounded by a swirling air stream

Linear stability analysis of a three-dimensional viscoelastic liquid jet surrounded by a swirling air stream

A Comprehensive Review on Fluid Dynamics and Transport of Suspension/Liquid Droplets and Particles in High-Velocity Oxygen-Fuel (HVOF) Thermal Spray

Mean Droplet Size and Local Velocity in Horizontal Isothermal Free Jets of Air and Water, respectively, Viscous Liquid in Quiescent Ambient Air

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