Some factors affecting droplet behaviour in liquid-liquid systems

Garner, F. H.; Skelland, A. H. P.

doi:10.1016/0009-2509(55)85017-8

Cited by 107 publications

(28 citation statements)

References 12 publications

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“…Savic (8) first observed from photographs of water drops falling through castor oil that the interfacial velocity appeared to vanish near the rear stagnation point and a stagnant cap over the rear of a drop was formed. Based on this observation, he proposed the stagnant cap model, which was experimentally confirmed by many investigations (9)(10)(11)(12)(13)(14). This seems indeed frequently the case except for highly soluble surfactants.…”

Section: Introductionmentioning

confidence: 57%

“…In solving the momentum equations, the implicit-explicit ADI algorithm is used to discretize Eqs. [9] to [12], and the same algorithm was depicted in detail in (21,28,34).…”

Section: Numerical Solutionmentioning

confidence: 97%

“…The boundary conditions for Eqs. [9] through [12] become the following: On the axis of symmetry (η 1 …”

Section: Governing Equations For Fluid Flowmentioning

confidence: 99%

See 2 more Smart Citations

The Effect of Surfactant on the Motion of a Buoyancy-Driven Drop at Intermediate Reynolds Numbers: A Numerical Approach

Li¹,

Mao²

2001

Journal of Colloid and Interface Science

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Section: Introductionmentioning

confidence: 57%

“…In solving the momentum equations, the implicit-explicit ADI algorithm is used to discretize Eqs. [9] to [12], and the same algorithm was depicted in detail in (21,28,34).…”

Section: Numerical Solutionmentioning

confidence: 97%

See 1 more Smart Citation

The Effect of Surfactant on the Motion of a Buoyancy-Driven Drop at Intermediate Reynolds Numbers: A Numerical Approach

Li¹,

Mao²

2001

Journal of Colloid and Interface Science

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“…A possible answer points to the variation of the relative solubility between the drop and the continuous phase due to the mass transfer of acetone into the drop. [57] The velocity maps shown in Figure 5 contain information with far more detail than integral methods. Figure 6 a shows the maximum internal velocity in the drop, which correlates quite well with the size of the mobile volume, as predicted by Huang and Kintner.…”

Section: à3mentioning

confidence: 98%

Rapid Multiphase Flow Dynamics Mapped by Single‐Shot MRI Velocimetry

2010

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A new, fast magnetic resonance imaging (MRI) method is described and applied to map flow fields in systems with internal velocities rapidly varying along the streamlines. While conventional MRI techniques encode the velocity information in a preparatory period prior to the imaging acquisition module, our technique repeatedly refreshes the velocity encoding during a single-shot imaging sequence. In this way, the maximum acceleration responsible for velocity variation of the molecules is increased by up to two orders of magnitude compared to standard procedures. Besides being compatible with high acceleration, this pulse sequence is suited to acquiring in a single scan the multiple velocity images required to construct a full velocity vector map. The power of this new methodology is demonstrated by following the internal dynamics of toluene droplets levitating in a counterflow of water during mass transfer of acetone from the water phase into the drop in the presence of surface-active impurities. The dramatic reduction in measurement time allows visualization for the first time of the important impact of even small concentrations of acetone on accumulation of surfactants at the drop's surface.

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“…Garner and Skelland (1955), Calderbank and Korchinski (1956), and Horton et al (1965) examined the influence of circulation inside drops on the drag coefficient and masstransfer rate. Clift et al (1978) conducted several studies on drop deformation and dynamic behavior.…”

Section: Introductionmentioning

confidence: 99%

VOF Simulation Studies on Single Droplet Fluid Dynamic Behavior in Liquid–Liquid Flow Process

Huang

Wang

2018

J. Chem. Eng. Japan / JCEJ

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The uid dynamic behavior of a drop during a freely rising process is investigated using the volume of uid (VOF) method in conjunction with the continuum surface force (CSF) model. A two-dimensional computational uid dynamic model is used to describe the mass and momentum transport. Measurements of the rise velocity and the aspect ratio for the toluene/water system without mass transfer for diameters ranging from 3-5 mm were obtained using a high-speed camera. The simulation results showed excellent agreement with the experimental data. The e ects of the physical properties on the drop rising velocities, aspect ratios, and coalescence behavior of two coaxial drops are also simulated and analyzed. The simulation results show that the laws for the variation of the uid dynamic behavior with the physical properties of a system provide important guidelines for the design and operation in a liquid-liquid column.

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Some factors affecting droplet behaviour in liquid-liquid systems

Cited by 107 publications

References 12 publications

The Effect of Surfactant on the Motion of a Buoyancy-Driven Drop at Intermediate Reynolds Numbers: A Numerical Approach

The Effect of Surfactant on the Motion of a Buoyancy-Driven Drop at Intermediate Reynolds Numbers: A Numerical Approach

Rapid Multiphase Flow Dynamics Mapped by Single‐Shot MRI Velocimetry

VOF Simulation Studies on Single Droplet Fluid Dynamic Behavior in Liquid–Liquid Flow Process

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