Simple and Inexpensive Design for an Isolated Droplet Generator Useful in Studies of Atomization in Flames

Russo, Richard E.; Withnell, Robert H.; Hieftje, Gary M.

doi:10.1366/0003702814732247

Cited by 40 publications

(19 citation statements)

References 12 publications

(19 reference statements)

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“…6 and consist of the charge timing circuitry, a variable medium voltage power supply, and a high speed switch. The droplets are charged using a system similar to that described by others (e.g., Russo et al 1981 ;Sangiovanni and Kesten 1976) for producing widely spaced single droplets. A small brass ring located near the point of droplet detachment applies a medium amplitude (250 V) square wave voltage pulse to charge the droplets as they detach from the capillary jet.…”

Section: Droplet Charging Apparatusmentioning

confidence: 99%

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Experiments examining drag in linear droplet packets

Nguyen

Dunn‐Rankin

1992

Experiments in Fluids

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This paper presents an experimental study of vertically traveling droplet packets, where the droplets in each packet are aligned linearly, one behind another. The paper describes in detail, an experimental apparatus that produces repeatable, linearly aligned, and isolated droplet packets containing 1-6 droplets per packet. The apparatus is suitable for examining aerodynamic interactions between droplets within each packet. This paper demonstrates the performance of the apparatus by examining the drag reduction and collision of droplets traveling in the wake of a lead droplet. Comparison of a calculated single droplet trajectory with the detailed droplet position versus time data for a droplet packet provides the average drag reduction experienced by the trailing droplets due to the aerodynamic wake of the lead droplet. For the conditions of our experiment (4 droplet packet, 145 ~tm methanol droplets, 10 m/s initial velocity, initial droplet spacing of 5.2 droplet diameters, Reynolds number approx. 80) the average drag on the first trailing droplet was found to be 75% of the drag on the lead droplet.

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Section: Droplet Charging Apparatusmentioning

confidence: 99%

“…The capacitor values allow approximately 6 droplets per packet, and the delay and width match the approximate operating frequency of the droplet generator. The variable medium voltage power supply and high speed switch are described in detail by Russo et al (1981).…”

Section: Droplet Charging Apparatusmentioning

confidence: 99%

Experiments examining drag in linear droplet packets

Nguyen

Dunn‐Rankin

1992

Experiments in Fluids

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“…It has to be noted that all studies with monodisperse droplet injection into the ICP go back to earlier research of the Hieftje group who used a droplet generator first to study desolvation and atomization processes in analytical flames (see, e.g., [17] and references therein).…”

Section: Introductionmentioning

confidence: 99%

Local effects of atomizing analyte droplets on the plasma parameters of the inductively coupled plasma

Groh

García

Murtazin

et al. 2009

Spectrochimica Acta Part B: Atomic Spectroscopy

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“…Unfortunately, a wide range of droplet sizes is produced and droplets travel an erratic path to and within the flame or plasma, making a detailed study of the events occurring to a single droplet almost impossible. To circumvent these difficulties, a device was developed (18,19) which enables individual droplets to be sent along a prescribed, reproducible trajectory in a flame. The photograph of Figure 6 shows this device in operation.…”

Section: Methods Based On Detection Of Charged Speciesmentioning

confidence: 99%

Approaching the limit in atomic spectrochemical analysis

Hieftje¹

1982

J. Chem. Educ.

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to the paper by Alkemade (1). Methods Based on Detection of Charged SpeciesAmong the most sensitive of the techniques used for monitoring atoms are those which rely upon ionization. Included among such techniques are resonance ionization spectroscopy, commonly abbreviated RIS (2, 3) and laser-enhanced ionization (LEI), which employs the so-called opto-galvanic effect or OGE (4). Because these detection methods are discussed in detail in other articles in this series, they will be considered only briefly here. The interested reader is referred to the papers by Hurst and Travis, respectively.The principles involved in RIS and LEI are easily understood with the aid of Figure 1. In Figure 1 ( See https://pubs.acs.org/sharingguidelines for options on how to legitimately share published articles.

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Simple and Inexpensive Design for an Isolated Droplet Generator Useful in Studies of Atomization in Flames

Cited by 40 publications

References 12 publications

Experiments examining drag in linear droplet packets

Experiments examining drag in linear droplet packets

Local effects of atomizing analyte droplets on the plasma parameters of the inductively coupled plasma

Approaching the limit in atomic spectrochemical analysis

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