Collision between an ethanol drop and a water drop

Gao, Taichang; Chen, Rong-Horng; Pu, Jen-Yung; Lin, Ta Hui

doi:10.1007/s00348-005-0952-1

Cited by 56 publications

(48 citation statements)

References 8 publications

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“…The distribution of the stresses on the interface leads to its bending. Images of the complicated shapes of the merged liquid drop can be found elsewhere (Gao et al 2005;Planchette et al 2009). The flow in the deforming drops in these cases is rather complicated and can be described in detail only using direct numerical simulations based on various computational fluid dynamics (CFD) methods, for example the particle (Sun, Xi & Chen 2009), front tracking (Pan, Law & Zhou 2008), lattice Boltzmann (Inamuro et al 2004), level set (Pan & Suga 2005) or volume-of-fluid methods ).…”

Section: Drop Collisionsmentioning

confidence: 99%

“…In all of these studies, the colliding drops consisted of the same liquid. More recently, investigations on collisions of drops consisting of different, in part immiscible, liquids have started (Gao et al 2005;Chen & Chen 2006;Chen 2007;Planchette, Lorenceau & Brenn 2009). The fields of technical applications of these kinds of drop collisions may range from combustion in engines to production † Email address for correspondence: roisman@sla.tu-darmstadt.de processes in some life sciences, such as the coating of a liquid core by another immiscible liquid.…”

Section: Introductionmentioning

confidence: 97%

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Binary collisions of drops of immiscible liquids

et al. 2011

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International audienceThis experimental and theoretical study is devoted to the investigation of head-on collisions of two drops of immiscible liquids. In the experiments, pairs of drops are made to collide at well-defined kinetic and geometric conditions. The sizes and relative velocity of the colliding drops close to the point of impact are measured by means of image processing. The deformed states after the impact, their evolution with time, and their stability are studied by visualization. The theory considers the dynamics of the rim formed at the edge of a radially spreading lamella due to capillary forces at the free surfaces of the lamella and at the liquid/liquid interface. The equations of the rim formation and motion are obtained from the volume, mass and momentum balance equations which account for the inertial, viscous and capillary effects. The theory predicts the evolution of the main geometrical parameters of the liquid mass formed by the drop collision: thickness of the lamella, diameter, and size of the rim cross-section. The theoretical predictions agree well with the experimental data, although no adjustable parameters are used in the model

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Section: Drop Collisionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Binary collisions of drops of immiscible liquids

et al. 2011

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“…Should this not be the case, there are three other types of droplet-droplet collision in addition to total coalescence: bounce, disruption, and fragmentation (as illustrated in the inset of Fig. 1) [17,18]. What is the dominant type of interaction between the droplets from the ESI spray and the sample spray?…”

Section: Introductionmentioning

confidence: 99%

On the mechanism of extractive electrospray ionization (EESI) in the dual-spray configuration

et al. 2011

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Dual-spray extractive electrospray ionization (EESI) mass spectrometry as a versatile analytical technique has attracted much interest due to its advantages over conventional electrospray ionization (ESI). The crucial difference between EESI and ESI is that in the EESI process, the analytes are introduced in nebulized form via a neutral spray and ionized by collisions with the charged droplets from an ESI source formed by spraying pure solvent. However, the mechanism of the droplet-droplet interactions in the EESI process is still not well understood. For example, it is unclear which type of droplet-droplet interaction is dominant: bounce, coalescence, disruption, or fragmentation? In this work, droplet-droplet interaction was investigated in detail based on a theoretical model. Phase Doppler anemometry (PDA) was employed to investigate the droplet behavior in the EESI plume and provide the experimental data (droplet size and velocity) necessary for theoretical analysis. Furthermore, numerical simulations were performed to clarify the influence of the sheath gas flow on the EESI process. No coalescence between the droplets in the ESI spray and the droplets in the sample spray was observed using various geometries and sample flow rates. Theoretical analysis, together with the PDA results, suggests that droplet fragmentation may be the dominant type of droplet-droplet interaction in the EESI. The interaction time between the ESI droplet and the sample droplet was estimated to be <5 μs. This work gives a clear picture of droplet-droplet interactions in the dual-spray EESI process and detailed information for the optimization of this method for future applications that require higher sensitivity.

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“…Collisions of unlike miscible drops with large surface tension difference, namely, ethanol drops and water drops, were discussed in Gao et al [7]. In addition to the conventional stretching separation, coalescence, and reflex separation phenomena, new phenomena, such as the splitting of the water drop and the generation of small satellites during the very early stage of the impact, have been discovered.…”

Section: Introductionmentioning

confidence: 97%

Diesel–diesel and diesel–ethanol drop collisions

Chen

2007

Applied Thermal Engineering

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Collision between an ethanol drop and a water drop

Cited by 56 publications

References 8 publications

Binary collisions of drops of immiscible liquids

Binary collisions of drops of immiscible liquids

On the mechanism of extractive electrospray ionization (EESI) in the dual-spray configuration

Diesel–diesel and diesel–ethanol drop collisions

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