Journal ArticleDOI
Hydrodynamics and mass transfer characteristics of a liquid/liquid stirred cell
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TLDR
In this paper, the hydrodynamics and mass transfer characteristics of a stirred cell for contacting immiscible phases are examined using a similarity solution for a rotating disk in laminar flow, such that the interface is stationary, and the rate of diffusion in the absence of any interfacial resistance is obtained.Abstract:
The hydrodynamics and mass transfer characteristics of a stirred cell for contacting immiscible phases are examined. When each phase is stirred with a rotating disk in laminar flow, such that the interface is stationary, the rate of diffusion in the absence of any interfacial resistance is obtained using a similarity solution. The hydrodynamics, specifically the radial velocity derivative at the interface, which is the most important component of the mass transfer solution, is obtained by combining the solutions for a finite disk and for the relationship between disk velocity and fluid core velocity. Excellent experimental agreement, within 5% of the theory, is observed.read more
Citations
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Journal ArticleDOI
A mass transfer model for the extraction of weak acids/based in emulsion liquid-membrane systems
Chih Chieh Chan,Chau Jen Lee +1 more
TL;DR: In this paper, a mathematical model for analysing the extraction of weak acids and weak bases from aqueous solution by liquid surfactant membrane has been presented, assuming that the reactions are reversible and the reaction equilibrium to exist in both the internal phase and the external continuous phase.
Journal ArticleDOI
Similarity solutions for stratified rotating-disk flow
TL;DR: In this paper, the Navier-Stokes equations of the Karman-Bodewadt-Batchelor (KBE) variety were studied for the case of nearly rigid rotation, with explicit analytical results for the large Reynolds-number boundary layer limit.
Journal ArticleDOI
Liquid solubilization dynamicsII. Flux enhancement by interface gel formation
TL;DR: In this article, a dynamic solubilization study was conducted to determine the mechanism of incorporation of oleic acid into aqueous sodium taurodeoxycholate solutions at 37°C in which the apparent diffusion limit of mixed micelles was exceeded.
Journal ArticleDOI
Liquid solubilization dynamics: Oleic acid in bile salt
TL;DR: The solubilization dynamics of oleic acid by aqueous sodium taurodeoxycholate solutions at 37°C does not conform to previous resistance in series models involving diffusion and interfacial steps as discussed by the authors.
Book ChapterDOI
Rare Earth Separations: Kinetics and Mechanistic Theories
TL;DR: In this article, the authors provide an overview of liquid-liquid extraction chemistry relevant to rare earth separations, the equipment and methods for collecting kinetics data, and fundamental kinetic models for dealing with extractions controlled by diffusion or slow chemical reactions.
References
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Journal ArticleDOI
Interfacial turbulence: Hydrodynamic instability and the marangoni effect
C.V. Sternling,L. E. Scriven +1 more
TL;DR: In this article, a simplified mathematical model has been analyzed in order to detail the mechanism of the "interfacial engine" which supplies the mechanical energy of interfacial turbulence, which is a manifestation of hydrodynamic instability, touched off by ever present, small, random fluctuations about the interface.
Journal ArticleDOI
Dynamics of a fluid interface Equation of motion for Newtonian surface fluids
TL;DR: In this article, the authors derived a completely general formulation of the dynamics of a Newtonian fluid interface, that is, one whose rheological behaviour is characterized by its equilibrium interfacial tension and B oussinesq's [18] two coefficients of surface viscosity.
Journal ArticleDOI
Contributions to the Theory of Heat Transfer through a Laminar Boundary Layer
TL;DR: In this article, an approximation to the heat transfer rate across a laminar incompressible boundary layer, for arbitrary distribution of main stream velocity and of wall temperature, is obtained by using the energy equation in von Mises's form, and approximating the coefficients in a manner which is most closely correct near the surface.
Journal ArticleDOI
On the flow between a rotating and a stationary disk
TL;DR: The analysis and experiments in this paper are restricted to the flow between two coaxial, infinite disks, one rotating and one stationary, and the results of numerical calculations show that many solutions can exist for a given Reynolds number Ωl2/v (Ω is the angular velocity of the rotating disk and I is the spacing between the two disks).
Journal ArticleDOI
The mechanism of mass transfer of solutes across liquid-liquid interfaces: Part I: the determination of individual transfer coefficients for binary systems
TL;DR: In this paper, a new type of transfer cell has been designed and used for the determination of the individual mass transfer coefficients, by the Colburn-Welsh technique, for eight partially miscible binary systems, in six of which one of the phases was water.
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