On the formation of drops from the rims of fan spray sheets

Clark, C.J.; Dombrowski, N.

doi:10.1016/0021-8502(72)90156-5

Cited by 34 publications

(2 citation statements)

References 6 publications

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“…An example of a flat bell is presented in Figure 18a where after impact the water jet (diameter D 0 , velocity U 0 ) produces a smooth liquid sheet that expands horizontally up to the maximal location R and then disintegrates into droplets. Here we focus on the evolution of the size of the sheet (Huang 1970) and do not address the atomization problem (Bremond & Villermaux 2006, Clark & Dombrowski 1972, Dombrowski & Fraser 1954, Lasheras & Hopfinger 2000, Mansour & Chigier 1990, Park et al 2004.…”

Section: Flat Bell or Liquid Sheetmentioning

confidence: 99%

Waterbells and Liquid Sheets

Clanet

2007

Annu. Rev. Fluid Mech.

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Waterbells result from the impact of a low-viscosity liquid jet (diameter D 0 , velocity U 0 ) on a solid surface (characteristic length D i ) of similar size (D i ∼ D 0 ). Their stationary shape mainly results from the equilibrium between inertia and surface tension. When closed, this shape becomes sensitive to the pressure difference that occurs across the sheet and the bell can become unstable or exhibit stationary cusps. We first review the work done on the shape and stability of waterbells, and then address the case of "special bells," like swirling bells, polygonal bells, and reverse bells. Finally, we discuss the singular limit of the "flat bell" or liquid sheet. 469 Annu. Rev. Fluid Mech. 2007.39:469-496. Downloaded from www.annualreviews.org Access provided by Georgetown University on 02/03/15. For personal use only.

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Section: Flat Bell or Liquid Sheetmentioning

confidence: 99%

Waterbells and Liquid Sheets

Clanet

2007

Annu. Rev. Fluid Mech.

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“…This instability is encountered in the rotating-cup configuration studied by Hinze & Milborn (1950) and Einsenklam (1964). Both instabilities have been considered by Clark & Dombrowski (1972) for a fan spray configuration and by Bush & Hasha (2004) for the impinging-jet case; these last authors dismiss the centrifugal instability based on an observation of the most unstable wavelength of the rim. The aim of the present work is to examine the processes of the sheet destabilization ( § § 3 and 4), in order to give a quantitative description of the overall drop size distribution in terms of the dynamics of the objects ( § 5) involved in the fragmentation process ( § 6).…”

Section: Introductionmentioning

confidence: 99%

Atomization by jet impact

2006

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The formation and fragmentation of liquid sheets resulting from the oblique collision of two identical cylindrical jets is investigated. The liquid expands radially from the impacting point forming a sheet in the form of a bay leaf bounded by a thicker rim. The sheet shape, rim size and liquid velocity field are quantified and represented analytically. External harmonic perturbations of the injection conditions reveal the nature of the rim destabilization and of its coupling with the sheet. Flow perturbations in the incident jets lead to sheet thickness modulations which trigger the fragmentation of the rim via the formation of liquid ligaments whose dynamics is described. The breakup of these ligaments induce both the shape and width of the drop size distribution in the spray formed by this process

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2000

Pesticide Application Methods

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On the formation of drops from the rims of fan spray sheets

Cited by 34 publications

References 6 publications

Waterbells and Liquid Sheets

Waterbells and Liquid Sheets

Atomization by jet impact

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