Flow and Diffusion Behavior as a Function of Viscosity in a Double-Y-Type Microfluidic Device

Nishi, Kazuhiko; Perera, Jilska M.; Misumi, Ryuta; Kaminoyama, Meguru; Stevens, Geoffrey W.

doi:10.1252/jcej.11we044

Cited by 5 publications

(6 citation statements)

References 13 publications

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“…Then, by using these estimated parameters, the interaction coefficients for the ethanol-CaCl 2 system were fitted to the experimental VLE data reported by Nishi [15] for the ethanolwater-CaCl 2 system (at a pressure of 1 atm and a salt concentration of 16.7 wt-% on a salt-free basis) to reproduce the experimental vapor composition and boiling temperature. Because all adjustable parameters were energy interaction, in this step, all of them -according to Eq.…”

Section: Thermodynamics Resultsmentioning

confidence: 99%

“…where T 0 was the reference temperature fixed at 298.15 K. It should be noted that the previously obtained parameters of ethanol-water and water-CaCl 2 were considered as k The entire set of parameters for the ethanol-water-CaCl 2 system was validated against the experimental VLE data reported by Nishi [15]. The results are shown numerically in Tab 3 and, also graphically, in Fig.…”

Section: Thermodynamics Resultsmentioning

confidence: 99%

“…As mentioned before, the parameters for the activity coefficient model (E-Wilson), developed in this work for the calculation of the VLE ratio, were obtained from experimental data reported by Nishi [15] for a CaCl 2 concentration of 16.7 wt-% (on a salt-free basis). Therefore, the concentration of the salt in the column stages should be kept as close as possible to the value of 16.7 wt-% to perform a conceptually consistent and reliable simulation of the column.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…3) The interaction coefficients for the ethanol-CaCl 2 system were fitted to the experimental VLE data reported by Nishi for the ethanol-water-CaCl 2 system [15] to reproduce the experimental vapor composition and boiling temperature of the ternary systems.…”

Section: Parameter Estimationmentioning

confidence: 99%

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Application of a New Gibbs Energy Equation to Model a Distillation Tower for Production of Pure Ethanol

et al. 2011

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A steady-state equilibrium-stage model based on MESH equations was proposed to simulate saline extractive distillation columns. The interaction parameters between each component of water-CaCl 2 and ethanol-water were obtained from mean ionic activity coefficients and vapor-liquid equilibrium (VLE) experimental data. Additionally, the interaction coefficients for the ethanol-CaCl 2 pair were fitted to experimental VLE data which were reported by Nishi for the ethanolwater-CaCl 2 system. It should be noted that adjustable parameters between each pair were considered to be temperature dependent. The results confirmed that the proposed model could accurately predict the experimental vapor-liquid equilibrium data for ethanol-CaCl 2 -water systems. Finally, the validated model was coded using MATLAB software and was solved using the Wang-Henke method, including the VLE and enthalpy models.

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Section: Thermodynamics Resultsmentioning

confidence: 99%

Section: Thermodynamics Resultsmentioning

confidence: 99%

Section: Simulation Resultsmentioning

confidence: 99%

Section: Parameter Estimationmentioning

confidence: 99%

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Application of a New Gibbs Energy Equation to Model a Distillation Tower for Production of Pure Ethanol

et al. 2011

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“…Simulations performed using a complete Y-Y mesh (see Figure 1a for details of the geometry) indicated that the development length was less than ∼1% of the pass length L, commensurate with previous studies (Žnidaršič-Plazl and Plazl 2007;Pohar et al 2012). For all simulation results presented, only the pass length segment of the microchannel was used, corresponding to the 'simplified mesh' method (Nishi et al 2010(Nishi et al , 2011. Hence, the fluid velocity was assumed to be fully developed in the x-direction:…”

Section: Momentum Balance Equationsmentioning

confidence: 99%

Modelling of interfacial mass transfer in microfluidic solvent extraction: part I. Heterogenous transport

Mason

Ciceri

Harvie

et al. 2012

Microfluid Nanofluid

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An investigation of molecular diffusion of solutes across water/oil interfaces in a Y-Y-shaped microchannel with an integrated guide structure is presented. Finite volume numerical simulations were compared with experimental literature data. Analytical approaches including an infinite composite medium model, phase-specific mass transfer coefficient models and a static transfer cell model were also assessed. An increase in accuracy for the mass transfer coefficient models was achieved by using local coefficients as opposed to lengthaveraged expressions. The static transfer cell model was shown to improve when based on the interfacial contact time, as opposed to the organic phase residence time. The results presented in this work have immediate application to the determination of kinetic rate constants in reactive mass transfer systems, as considered in Part II of this study (Ciceri D, Mason LR, Harvie DJE, Perera JM, Stevens GW (2012) Modelling of interfacial mass transfer in

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Modelling of interfacial mass transfer in microfluidic solvent extraction: part II. Heterogeneous transport with chemical reaction

Ciceri

Mason

Harvie

et al. 2012

Microfluid Nanofluid

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The use of a microfluidic device in determining the extraction kinetics of Co II ions by di-(2-ethylhexyl) phosphoric acid (DEHPA) was demonstrated. Experimental data obtained using a Y-Y-shaped microchannel were modelled using a finite volume method.The contributions of diffusion and reaction transport resistances to the overall rate of mass transfer were obtained. A diffusion-controlled transfer assumption could not account for the experimental data, confirming that transport occurs under a mixed reaction-diffusion resistance regime. The reaction rate constant was determined to be (2.4 ± 0.6) × 10 −10 m/s, in good agreement with corresponding Lewis cell measurements from the literature.

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Flow and Diffusion Behavior as a Function of Viscosity in a Double-Y-Type Microfluidic Device

Cited by 5 publications

References 13 publications

Application of a New Gibbs Energy Equation to Model a Distillation Tower for Production of Pure Ethanol

Application of a New Gibbs Energy Equation to Model a Distillation Tower for Production of Pure Ethanol

Modelling of interfacial mass transfer in microfluidic solvent extraction: part I. Heterogenous transport

Modelling of interfacial mass transfer in microfluidic solvent extraction: part II. Heterogeneous transport with chemical reaction

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