Heating and Evaporation of Monocomponent Droplets

Sazhin, Sergei

doi:10.1007/978-1-4471-6386-2_4

Cited by 1 publication

(4 citation statements)

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“…Several theoretical models have been developed that describe the process of evaporating single droplets falling in a gas flow 52,60−63 and evaporation of droplets in a monodisperse chain. 56,64,65 The droplet chain method has been demonstrated to be a good choice for the experimental study of evaporation processes not only in spray drying but also in other areas such as microfluidics, MEMS, combustion, and colloids chemistry. 66−70 This broad interest comes from its ability to overcome many of the drawbacks encountered in other techniques.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Particles do not need to remain homogeneous, spherical, or electrically charged. 65 Techniques involving droplets suspended from thin filaments may bias evaporation rates by affecting heat conduction via the contact between the filament and the droplet. Also, filament techniques normally require droplets with diameters in the millimeter range, which undergo a different evaporation process compared to that of microdroplets relevant for inhalation applications.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Four main techniques were used in these studies: observation of a single droplet in a quiescent gas, − where one isolated droplet evaporates falling or while levitated, typically in a room temperature environment; analysis of droplets suspended from thin filaments, where several droplets evaporate while attached to a wire; − observation of a single droplet falling in a gas flow, − where only one droplet evaporates in an air flow; and studies on monodisperse free falling droplets, − where a chain of droplets is injected into a gas flow. Several theoretical models have been developed that describe the process of evaporating single droplets falling in a gas flow ,− and evaporation of droplets in a monodisperse chain. ,, …”

Section: Introductionmentioning

confidence: 99%

“…For droplet chain techniques evaporation measurements are feasible very shortly after generation of the droplet unlike in some single droplet techniques that require capture and stabilization of a droplet before measurements can commence. Particles do not need to remain homogenous, spherical, or electrically charged 65 . Techniques involving droplets suspended from thin filaments may bias evaporation rates by affecting heat conduction via the contact between the filament and the droplet.…”

mentioning

confidence: 99%

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Analysis of the Particle Formation Process of Structured Microparticles

et al. 2015

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The particle formation process for microparticles of cellulose acetate butyrate dried from an acetone solution was investigated experimentally and theoretically. A monodisperse droplet chain was used to produce solution microdroplets in a size range of 55-70 μm with solution concentrations of 0.37 and 10 mg/mL. As the droplets dried in a laminar air flow with a temperature of 30, 40, or 55 °C, the particle formation process was recorded by two independent optical methods. Dried particles in a size range of 10-30 μm were collected for morphology analysis, showing hollow, elongated particles whose structure was dependent on the drying gas temperature and initial solution concentration. The setup allowed comprehensive measurements of the particle formation process to be made, including the period after initial shell formation. The early particle formation process for this system was controlled by the diffusion of cellulose acetate butyrate in the liquid phase, whereas later stages of the process were dominated by shell buckling and folding.

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Section: ■ Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%