Liquid‐Liquid Emulsion Produced by 3D‐Printed Vortex‐Based Hydrodynamic Cavitation Device

Thaker, Abhijeet H.; Boreham, Paul; Kourousis, Kyriakos I.; Ranade, Vivek V.

doi:10.1002/ceat.202300061

Cited by 2 publications

(3 citation statements)

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“…The knowledge of Sauter mean diameters allows the calculation of the droplet breakage efficiency, η. Thaker at al . previously reported the droplet breakage efficiency of a vortex-based HC device for low oil volume fractions.…”

Section: Resultsmentioning

confidence: 99%

“…The droplet breakage efficiency (η) values of the vortex-based HC device for different oil volume fraction emulsions as a function of energy consumption per unit mass ( E ) are shown in Figure . The values of η of vortex-based HC device for an oil volume fraction of 0.05 (α o = 0.05), as reported by Thaker and Ranade, are also included for comparison in Figure .…”

Section: Resultsmentioning

confidence: 99%

“…The knowledge of Sauter mean diameters allows the calculation of the droplet breakage efficiency, η. Thaker at al. 57 previously reported the droplet breakage efficiency of a vortex-based HC device for low oil volume fractions. For quantifying influence of higher oil volume fraction on droplet breakage efficiency, the data collected in this work were used to calculate droplet breakage efficiency following the method from Thaker and Ranade 20 as…”

Section: Effective Viscosity Of Emulsionmentioning

confidence: 99%

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Dense Oil in Water Emulsions using Vortex-Based Hydrodynamic Cavitation: Effective Viscosity, Sauter Mean Diameter, and Droplet Size Distribution

Upadhyay,

Ravi,

Ranade

2024

Ind. Eng. Chem. Res.

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Vortex-based hydrodynamic cavitation offers an effective platform for producing emulsions. In this work, we have investigated characteristics of dense oil in water emulsions with oil volume fractions up to 60% produced using a vortex-based cavitation device. Emulsions were prepared using rapeseed oil with oil volume fractions of 0.15, 0.3, 0.45, and 0.6. For each of these volume fractions, the pressure drop as a function of the flow rate of emulsions through the cavitation device was measured. These data were used for estimating the effective viscosity of the emulsions. The droplet size distribution of the emulsions was measured using the laser diffraction technique. The influence of the number of passes through the cavitation device on droplet size distributions and the Sauter mean diameter was quantified. It was found that the Sauter mean diameter (d 32 ) decreases with an increase in the number of passes as n −0.2 . The Sauter mean diameter was found to be almost independent of oil volume fraction (α o ) up to a certain critical volume fraction (α oc ). Beyond α oc , d 32 was found to be linearly proportional to a further increase in oil volume fraction. As expected, the turbidity of the produced emulsions was found to be linearly proportional to the oil volume fraction. The slope of turbidity versus oil volume fraction can be used to estimate the Sauter mean diameter. A suitable correlation was developed to relate turbidity, volume fraction, and Sauter mean diameter. The droplet breakage efficiency of the vortex-based cavitation device for dense oil in water emulsions was quantified and reported. The breakage efficiency was found to increase linearly with an increase in oil volume fraction up to α oc and then plateau with a further increase in the oil volume fraction. The breakage efficiency was found to decrease with an increase in energy consumption per unit mass (E) as E −0.8 . The presented results demonstrate the effectiveness of a vortex-based cavitation device for producing dense oil in water emulsions and will be useful for extending its applications to other dense emulsions.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%