Atomization of PEO aqueous solutions in effervescent atomizers

Broniarz-Press, L.; Ochowiak, Marek; Woziwodzki, Szymon

doi:10.1016/j.ijheatfluidflow.2010.02.005

Cited by 32 publications

(24 citation statements)

References 16 publications

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“…In the case of polymer solutions the Trouton ratio increases with increasing strain rate and with the polymer concentration in solution. Taking into account the wide disparity in the results obtained on the extensional viscosity [20] and the accepted value of the Trouton ratio for Newtonian liquids (Tr = 3), the results can be considered satisfactory. Because all the measurements have been taken in the same conditions and at the same measuring equipment, the data for all liquids tested can be compared.…”

Section: Analysis Of Rheological Properties Of Fluidsmentioning

confidence: 90%

See 1 more Smart Citation

The effect of extensional viscosity on the effervescent atomization of polyacrylamide solutions

Ochowiak

Broniarz-Press

Różańska

et al. 2012

Journal of Industrial and Engineering Chemistry

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Section: Analysis Of Rheological Properties Of Fluidsmentioning

confidence: 90%

“…It has been shown that the PEO added to water will affect SMD value. The SMD increased as the liquid shear viscosity was increased by increasing polymer molecular weight [20].…”

Section: Introductionmentioning

confidence: 97%

The effect of extensional viscosity on the effervescent atomization of polyacrylamide solutions

Ochowiak

Broniarz-Press

Różańska

et al. 2012

Journal of Industrial and Engineering Chemistry

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“…Atomization of solution is a common phenomenon in numerous practical applications [121][122][123][124]. In the breakup of surfactant-laden liquid, critical micelle concentration (CMC) has an important influence [125][126][127][128][129].…”

Section: Complex Fluidsmentioning

confidence: 99%

Breakup Morphology and Mechanisms of Liquid Atomization

Zhao¹,

Liu²

2020

Environmental Impact of Aviation and Sustainable Solutions

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Fuel atomization, the transformation of bulk liquid into sprays, is of importance in jet engines. In this chapter, we will introduce the latest research advances on breakup morphology and mechanism of liquid atomization. On primary atomization, based on the morphological difference, the twin-fluid atomization could be classified into different regimes. The influence of Kelvin-Helmholtz and Rayleigh-Taylor instability on breakup morphology and fragment size is great and nonmonotonic. On secondary atomization, Rayleigh-Taylor instability is considered as the main driving mechanism in different bag-breakup modes; for higher Weber number, it will be in concurrence with the shear instability. Based on ligamentmediated spray formation model, ligament breakup is found to be well represented by the gamma distributions. Atomization of complex fluids has special characteristics and mechanisms. There are also a lot of research advances recently in this field.

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“…At present study, effervescent atomizer is chosen since it has so far been found effective for high viscosity liquids [33], in which the gas is introduced into the liquid at low pressure to form a bubbly two-phase mixture upstream of the orifice. As indicated by experimental observation, the flow pattern closed to the nozzle exit is similar to annular.…”

Section: Sub-model Of Primary Atomizationmentioning

confidence: 99%

Numerical Models for Viscoelastic Liquid Atomization Spray

2016

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Atomization spray of non-Newtonian liquid plays a pivotal role in various engineering applications, especially for the energy utilization. To operate spray systems efficiently and well understand the effects of liquid rheological properties on the whole spray process, a comprehensive model using Euler-Lagrangian approaches was established to simulate the evolution of the atomization spray for viscoelastic liquid. Based on the Oldroyd model, the viscoelastic linear dispersion relation was introduced into the primary atomization; an extended viscoelastic version of Taylor analogy breakup (TAB) model was proposed; and the coalescence criteria was modified by rheological parameters, such as the relaxation time, the retardation time and the zero shear viscosity. The predicted results are validated with experimental data varying air-liquid mass flow ratio (ALR). Then, numerical calculations are conducted to investigate the characteristics of viscoelastic liquid atomization process. Results showed that the evolutionary trend of droplet mean diameter, Weber number and Ohnesorge number of viscoelastic liquids along with axial direction were qualitatively similar to that of Newtonian liquid. However, the mean size of polymer solution increased more gently than that of water at the downstream of the spray, which was beneficial to stable control of the desirable size in the applications. As concerned the effects of liquid physical properties, the surface tension played an important role in the primary atomization, which indicated the benefit of selecting the solvents with lower surface tension for finer atomization effects, while, for the evolution of atomization spray, larger relaxation time and zero shear viscosity increased droplet Sauter mean diameter (SMD) significantly. The zero shear viscosity was effective throughout the jet region, while the effect of relaxation time became weaken at the downstream of the spray field.

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Atomization of PEO aqueous solutions in effervescent atomizers

Cited by 32 publications

References 16 publications

The effect of extensional viscosity on the effervescent atomization of polyacrylamide solutions

The effect of extensional viscosity on the effervescent atomization of polyacrylamide solutions

Breakup Morphology and Mechanisms of Liquid Atomization

Numerical Models for Viscoelastic Liquid Atomization Spray

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