Separation of oil-water mixture in tank

Das, Sovik; Biswas, Manindra Nath

doi:10.1080/00986440302095

Cited by 9 publications

(5 citation statements)

References 7 publications

(4 reference statements)

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“…These emulsions cause problems at different down-stream stages of production. Corrosion of pipes, pumps, and processing equipment, as well as deactivation of catalysts, are all consequences of the presence of water droplets [2][3][4][5][6][7][8][9]. Therefore, the phases are usually separated before they are transported over long distances.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Computational Analysis on Influence of Water Level on Oil-Water Separator Efficiency

Behin

Azimi

2015

Separation Science and Technology

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This work applied three-dimensional and volume of fluid (VOF) model of computational fluid dynamic (CFD) simulation to demonstrate the movement of liquid-liquid interface in a primary oil-water separator. Basic sediment and water as well as salt removal had been used as criteria for the separator efficiency, experimentally. Water removal from organic phase was considered as the efficiency using CFD. Simulation was performed for different water levels and the way this parameter can influence the efficiency was studied. Experimental and CFD simulation results were in relative agreement and showed that the optimum water level is 58 and 50 % of separator's diameter, respectively.

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Section: Introductionmentioning

confidence: 99%

Experimental and Computational Analysis on Influence of Water Level on Oil-Water Separator Efficiency

Behin

Azimi

2015

Separation Science and Technology

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“…This is because both of them are the comprehensive manifestation of the joint influence of oil droplet particle size, shape, density, surface tension and other factors, reflecting the resistance to the water when the oil droplet interacts with the water body, which is one of the most vital physical quantities in the kinematic properties of oil. It can not only be directly applied to practical industrial problems such as the design of oil separator tanks in sewage treatment and oil-water separation devices in oil extraction, but can also be used immediately in research on the migration behaviors of oil spills in inland rivers or marine environments, which is a crucial technical parameter for the construction of oil spill models [32].…”

Section: Kinematics and Dynamics Characterizing Of The Free-rising Mo...mentioning

confidence: 99%

Migration Movements of Accidentally Spilled Oil in Environmental Waters: A Review

Jiang,

Han,

Wang

et al. 2023

Water

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Accidentally spilled oil can cause great harm to the ecological balance of water once it enters the environmental waters. Clarifying its movement behavior and migration law in water has been the focus of environmental hydraulics research. This review starts from the mechanism of the oil spill migration process, and firstly reviews the kinematic characteristics of the smallest moving unit of the oil spill, the individual oil droplet, as well as focusing on several key aspects such as droplet shape, trajectory, terminal velocity and drag coefficient. Subsequently, considering the commonalities and differences between inland riverine and oceanic environments, different aspects of oil droplet collision, coalescence, breakage, particle size distribution, and vertical diffusion are discussed separately. Finally, the current status of research on the migration laws of accidental oil spills in environmental waters is summarized, and feasible future research directions are proposed to address the emerging research problems and research gaps.

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“…We utilize the droplet size distribution with N = 10 given by Fig. 2 of Das and Biswas [91], a histogram of relative frequencies, which is converted into the initial vector 0 in Table 2. We use here the viscosity function…”

Section: Example 8: Oil-in-water Dispersion Model: Creaming Of a Dispmentioning

confidence: 99%

“…Example 8: Droplet sizes and initial volume fractions for a dispersion of diesel oil in water according to[91] …”

mentioning

confidence: 99%

A family of numerical schemes for kinematic flows with discontinuous flux

et al. 2007

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Multiphase flows of suspensions and emulsions are frequently approximated by spatially one-dimensional kinematic models, in which the velocity of each species of the disperse phase is an explicitly given function of the vector of concentrations of all species. The continuity equations for all species then form a system of conservation laws which describes spatial segregation and the creation of areas of different composition. This class of models also includes multi-class traffic flow, where vehicles belong to different classes according to their preferential velocities. Recently, these models were extended to fluxes that depend discontinuously on the spatial coordinate, which appear in clarifier-thickener models, in duct flows with abruptly varying cross-sectional area, and in traffic flow with variable road surface conditions. This paper presents a new family of numerical schemes for such kinematic flows with a discontinuous flux. It is shown how a very simple scheme for the scalar case, which is adapted to the "concentration times velocity" structure of the flux, can be extended to kinematic models with phase velocities that change sign, flows with two or more species (the system case), and discontinuous fluxes. In addition, a MUSCL-type upgrade in combination with a Runge-Kutta-type time discretization can be devised to attain second-order accuracy. It is proved that two particular schemes within the family, which apply to systems of conservation laws, preserve an invariant region of admissible concentration vectors, provided that all velocities have the same sign. Moreover, for the relevant case of a multiplicative flux discontinuity and a constant maximum density, it is proved that one scalar version converges to a BV t entropy solution of the model. In the latter case, the compactness proof involves -R. Bürger et al. a novel uniform but local estimate of the spatial total variation of the approximate solutions. Numerical examples illustrate the performance of all variants within the new family of schemes, including applications to problems of sedimentation, traffic flow, and the settling of oil-in-water emulsions.

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Separation of oil-water mixture in tank

Cited by 9 publications

References 7 publications

Experimental and Computational Analysis on Influence of Water Level on Oil-Water Separator Efficiency

Experimental and Computational Analysis on Influence of Water Level on Oil-Water Separator Efficiency

Migration Movements of Accidentally Spilled Oil in Environmental Waters: A Review

A family of numerical schemes for kinematic flows with discontinuous flux

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