Effect of flow field and electric field coupling on oil–water emulsion separation

Wang, Zhihua; Qi, Xin; Zhuang, Yongtao; Wang, Qun; Sun, Xitong

doi:10.5004/dwt.2023.29221

Cited by 7 publications

(3 citation statements)

References 35 publications

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“…For an incompressible fluid div → v = 0, the equations of the motion of a viscous fluid are described by the Navier-Stokes equation [39,40].…”

Section: Theoretical Calculations Of Product Movement In the Screw Pressmentioning

confidence: 99%

Influence of Grinding Degree and Screw Rotation Speed on Sunflower Oil Pressing Process

Abdilova,

Sergibayeva,

Orynbekov

et al. 2023

Applied Sciences

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Sunflower is a major agricultural oilseed crop, and the Republic of Kazakhstan has been steadily strengthening its position as a producer of oilseeds. In this study, an oil pressing machine with two processes, including grinding sunflower seeds and pressing the obtained cake to separate the oil, is constructed. The experiment investigated the impact of different grinding degrees (hole diameters of plates of 5 mm, 4 mm, 3 mm, and 2 mm) and screw rotation speeds (ranging from 30 rpm to 250 rpm) on oil pressing efficiency. The study used sunflower seeds with an oil content of 45–47% and moisture of 7–9%. The results showed that increasing the grinding degree and screw rotation speed led to higher oil yield. The optimal condition was a grinding degree of 4 mm and a screw rotation speed of 60 rpm, resulting in the highest oil yield of 15.6 g/s. Additionally, the residual oil content of the seed cake decreased significantly as pressure increased during pressing, particularly with 4 mm grinding. Power consumption increased with higher screw rotation speeds and finer grinding degrees, indicating the influence of grinding components on energy demand. The cake density increased with higher screw rotation speeds and finer grinding degrees, highlighting the impact of grinding mechanisms on cake compactness. Moreover, the temperature of the cake rose with increased screw rotation speed and the presence of grinding sieves. These findings provide valuable insights into optimizing the sunflower oil pressing process, highlighting the importance of selecting appropriate grinding degrees and screw rotation speeds to maximize oil yield and pressing efficiency.

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“…For an incompressible fluid div → v = 0, the equations of the motion of a viscous fluid are described by the Navier-Stokes equation [39,40].…”

Section: Theoretical Calculations Of Product Movement In the Screw Pressmentioning

confidence: 99%

Influence of Grinding Degree and Screw Rotation Speed on Sunflower Oil Pressing Process

Abdilova,

Sergibayeva,

Orynbekov

et al. 2023

Applied Sciences

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“…Wang et al [51] carried out a numerical study of a two-phase system consisting of oil-water emulsion and superposed both electric field and flow to study the effect of electric field on oil-water separation. Similarly, Qi et al [52] employed a numerical approach to study two-phase oil-water separation in oilfield production.…”

Section: Introductionmentioning

confidence: 99%

Water Flow Boiling in Micro/Mini Channels Using Volume of Fluid Model

Khan Mughal,

Waheed,

Sadiq

et al. 2024

Applied Sciences

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Recent advancements in computational fluid dynamics (CFD) have triggered research in the field of heat exchangers. Driven by the need to decrease the size of heat exchangers, many researchers have exploited the higher heat transfer achieved by replacing single-phase flow systems with boiling counterparts. The concept of using mini-channels to provide compact heat exchangers while maintaining heat transfer performance is relatively new. A minimal number of researchers have reported simulations of water-steam systems in mini-channels. This paper presents a numerical study of the heat transfer performance (HTP) of mini channels in a water-steam system using the volume of fluid (VOF) model coupled with the Lee phase change model on commercial CFD software ANSYS. The numerical model consisted of a 1 mm × 1.5 mm × 52 mm channel with boundary conditions: top adiabatic; constant heat flux at the bottom surface; left/right periodic; mass flow inlet and pressure outlet. A mesh independence study was carried out for the proposed model, and simulations were validated against the experimental results of heat transfer versus vapor quality for a wide range of mass and heat fluxes. The VOF model best predicts experimental HTC at high mass fluxes, although the results at low mass fluxes were predicted with reasonable accuracy. Based on the agreement of numerical and numerical results, the VOF model turned out to be a promising candidate for designing compact micro/mini channel heat exchangers.

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“…In order to separate free water from soil in an oil field with coalescing plates, Qi et al [44] looked into flow field properties. Wang et al [45] looked into the effects of flow field and electric field coupling on oil-water emulsion separation. Following twenty minutes of application of a square-wave electric field operating at a frequency of 3 kHz and an intensity of 2.0 kV/cm, they observed that the emulsified water separation rate exceeded 90% and the water content at the oil outflow was less than 1.5%.…”

Section: Introductionmentioning

confidence: 99%

Biomagnetic Fluid Flow on a Nonlinearly Stretching Sheet with Variable Thickness in a Magnetic Environment

Murtaza,

Misra,

Tzirtzilakis

et al. 2023

J. Adv. App. Comput. Math.

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The main contribution of the current work is a numerical and mathematical investigation of the effects of magnetic dipole and electrical conductivity on the heat and flow transfer of biomagnetic fluid over a non-linear stretched sheet with variable thickness. Static magnetic fields are produced by magnetic dipoles, which are used in medical a pplications such as MRI, drug administration, and cancer therapy. Additionally, the impact of non-linear heat source/sink features was examined in the study, leading to an interesting phenomenon. The PDEs are attenuated to nonlinear ODEs with dealing appropriate similarity variables. These resultant ODEs are computed by developing an effective method emerged on the application of the finite differences technique. In the end, this section offers a summary of the implications resulting from different physical limitations on blood flow, including variable thickness and power index effects. It was discovered that the rise in Kelvin and Lorentz forces in the boundary layer significantly affected blood flow. The current findings for the biomagnetic fluid model are novel and inventive since they effectively expand upon the issues previously addressed by previously published scientific documentation.

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Effect of flow field and electric field coupling on oil–water emulsion separation

Cited by 7 publications

References 35 publications

Influence of Grinding Degree and Screw Rotation Speed on Sunflower Oil Pressing Process

Influence of Grinding Degree and Screw Rotation Speed on Sunflower Oil Pressing Process

Water Flow Boiling in Micro/Mini Channels Using Volume of Fluid Model

Biomagnetic Fluid Flow on a Nonlinearly Stretching Sheet with Variable Thickness in a Magnetic Environment

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