The Influence of Viscoelast1c Fluid Properties on Spray Formation From Flat-Fan and Pressure-Swirl Atomizers

Stelter, M.; Brenn, Günter; Durst, F.

doi:10.1615/atomizspr.v12.i123.160

Cited by 22 publications

(15 citation statements)

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“…The structure, kinematics and stability of thin films have been well studied both experimentally and analytically throughout the literature for Newtonian fluids [1][2][3][4]. However, despite the importance of these fluids and flows to a host of commercial and industrial applications such as agrochemical spraying, spray coating, and inkjet printing, little work has been done to study the break-up of thin films of viscoelastic fluids [5][6][7][8][9][10]. The studies that do exist focus primarily on correlating atomization characteristics and droplet size distribution measurements to changes in polymer concentration, molecular weight and fluid rheology.…”

Section: Introductionmentioning

confidence: 99%

The atomization of viscoelastic fluids in flat-fan and hollow-cone spray nozzles

Thompson

Rothstein

2007

Journal of Non-Newtonian Fluid Mechanics

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Section: Introductionmentioning

confidence: 99%

The atomization of viscoelastic fluids in flat-fan and hollow-cone spray nozzles

Thompson

Rothstein

2007

Journal of Non-Newtonian Fluid Mechanics

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“…1, [3][4][5] However, despite the importance of these fluids and flows to a host of commercial and industrial applications such as agrochemical spraying, spray coating, and ink jet printing, little work has been done to study the breakup of thin films of viscoelastic fluids. [6][7][8][9] The studies that do exist focus primarily on correlating atomization characteristics and droplet size distribution measurements to changes in polymer concentration, molecular weight and fluid rheology. These correlations are often valid only for a specific nozzle design.…”

mentioning

confidence: 99%

Collision of viscoelastic jets and the formation of fluid webs

Miller¹,

Gibson²,

McWilliams³

et al. 2005

Applied Physics Letters

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This letter reports experimental observations of the flow kinematics and stability of thin fluid sheets produced by impinging obliquely aligned laminar jets of a series of viscoelastic worm-like micelle solutions. As the velocity of the impinging jets is increased, the sheets of viscoelastic fluid grow larger and eventually become unstable. High speed imaging reveals a transition to a striking new flow structure resembling fluid webs, previously unobserved for Newtonian or non-Newtonian fluids. These newly discovered flow structures are complex and comprised of highly interconnected filaments created by the growth of multiple internal failures within the fluid sheet. Increasing viscoelasticity of the test fluid was found to stabilize the sheets and the fluid webs while increasing the drop size produced by their eventual breakup under capillary stresses.

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“…Signi¦cant are, in particular, the works by Mun et al [11], Thompson and Rothstein [12], Harrison et al [13], and Stelter et al [14]. These studies show the in §uence of the extensional behavior on hindering the formation of drops.…”

Section: Introductionmentioning

confidence: 89%

Spray behavior of non-newtonian fluids: correlation between rheological measurements and droplets/threads formation

Negri

Ciezki

Schlechtriem

2013

Progress in Propulsion Physics

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The formation of thread-like structures instead of droplets has been observed in recent studies on the injection of various gels and nonNewtonian §uids through a doublet impinging jet injector. In the present work, it has been studied if a correlation can be found between distinct §uid properties and thread formation. For this task, the tests have been conducted with di¨erent classes of §uids with various §uid properties. These classes are: Boger §uids, linear and crosslinked polymer solutions, and silica suspensions. The results show that a correlation exists between thread formation and the extensional behavior of the §uid, in particular, high values of the Trouton ratio. The characterization of the extensional behavior of §uids with a distinct yield stress has been conducted with a capillary rheometer, and the results obtained with this technique are compared to the spray behavior.

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The Influence of Viscoelast1c Fluid Properties on Spray Formation From Flat-Fan and Pressure-Swirl Atomizers

Cited by 22 publications

References 0 publications

The atomization of viscoelastic fluids in flat-fan and hollow-cone spray nozzles

The atomization of viscoelastic fluids in flat-fan and hollow-cone spray nozzles

Collision of viscoelastic jets and the formation of fluid webs

Spray behavior of non-newtonian fluids: correlation between rheological measurements and droplets/threads formation

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