Regime map of non-coalescence between two equal-sized uncharged water droplets suspended in oil: A numerical study DOI
D.D. Saifullin,

D. S. Lukin,

А. В. Самусенко

et al.

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(12)

Published: Dec. 1, 2024

This paper is devoted to numerical simulation of collision and consequent separation conductive same-sized droplets different sizes (from 0.3 2 mm) under the effect a constant voltage exceeding threshold transition from coalescence non-coalescence. The computations were based on arbitrary Lagrangian–Eulerian method—the interface between two phases was represented as geometry line that moves in accordance with calculated fluid velocity throughout solution problem. Four possible modes ranges electric field strength values corresponding them identified, ranked by their negative impact demulsification process: rebound, into three or multiple drops, electrospraying. includes narrow electrospraying beside “coalescence-non-coalescence” during “rebound-multidrops” transition. A “regime map”—a diagram outcomes depending size drops strength—was formed analyzed summarize results identify most favorable processes. map revealed an area when substituted only rebound drop radius increases, i.e., there will be no smaller after interaction.

Language: Английский

Optimization of chitosan-based demulsifiers via interfacial displacement: A molecular dynamics and principal component analysis approach DOI

Yuanhong Yu,

Xianyu Song,

Yang Xu

et al.

Separation and Purification Technology, Journal Year: 2025, Volume and Issue: unknown, P. 132693 - 132693

Published: March 1, 2025

Language: Английский

Citations

0
Motion and separation characteristics of oil droplets in high-pressure oil-water separation processes DOI
Meng Yang, Shuo Liu, Lin-tong Hou

et al.

Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(4)

Published: April 1, 2025

A small-scale separator was used for controlled experiments to further analyze oil droplet motion and separation characteristics under high pressure. The process monitored at varying pressures, focusing on stratification interface dynamics. size distribution in the water phase measured realistically, its pressure-dependent variation predicted. Numerical simulations incorporating predicted were performed validated against experimental data. results confirmed that increasing pressure reduced concentrated their distribution, slowing oil-water movement impeding separation. Furthermore, enhanced emulsion stability, with over 80% of emulsions remaining unseparated pressures exceeding 60.0 bar. These findings underscore necessity post-treatment strategies high-pressure systems.

Language: Английский

Citations

0
Enhancing the Demulsification of W/O Emulsions via Optimizing the Molecular Structure of Non-ionic Polyether Demulsifiers DOI
Minghui Jiang, Xueqing Bi, Peiwen Xiao

et al.

Journal of Polymer Research, Journal Year: 2025, Volume and Issue: 32(5)

Published: May 1, 2025

Language: Английский

Citations

0
Preparation of Superhydrophobic and Multifunctional Sponges for Oil/Water Separation and Oil Absorption DOI

Zhishuang Han,

Xinmeng Lv,

Yingge Li

et al.

Langmuir, Journal Year: 2024, Volume and Issue: 40(45), P. 23902 - 23917

Published: Nov. 1, 2024

For settling the recycling problem of waste polyurethane sponges (PU) and environment pollution oil spills simultaneously, this work exploited multifunctional superhydrophobic PU materials via dip-coating method, which were prepared by anchoring modified Fe3O4 expandable graphite (EG) on under adhesion effect polydimethylsiloxane (PDMS). The water contact angle sliding as-prepared reached 154.1 ± 1.6 8°, respectively. Most importantly, endowed with multipath treatment ability, consisted magnetically driven, gravity-driven, peristaltic pump-driven, photothermally driven modes. Besides, light absorption capacity, separation flux, efficiency for 23.9 g/g, 27779 L m–2 h–1, 99.5%, Owing to photothermal conversion ability EG, temperature was raised 71.5 °C within 233 s 1.2 solar irradiation (1200 W/m2), demonstrating its potential high-viscosity crude oils. In addition, exhibited good chemical/mechanical stability, self-cleaning, flame retardancy. a nutshell, article has evolved an environmentally benign practical method fabricating in spill treatment, will efficiently accomplish targets low carbon environmental management.

Language: Английский

Citations

2
Amphiphilic comb-block copolymers synthesized by photoinitiated polymerization for stabilization of oil–water emulsion by solution self-assembly DOI
Bin Sun, Peilun Wang,

Chongkun Shao

et al.

Fuel, Journal Year: 2024, Volume and Issue: 385, P. 134164 - 134164

Published: Dec. 26, 2024

Language: Английский

Citations

1
Regime map of non-coalescence between two equal-sized uncharged water droplets suspended in oil: A numerical study DOI
D.D. Saifullin,

D. S. Lukin,

А. В. Самусенко

et al.

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(12)

Published: Dec. 1, 2024

This paper is devoted to numerical simulation of collision and consequent separation conductive same-sized droplets different sizes (from 0.3 2 mm) under the effect a constant voltage exceeding threshold transition from coalescence non-coalescence. The computations were based on arbitrary Lagrangian–Eulerian method—the interface between two phases was represented as geometry line that moves in accordance with calculated fluid velocity throughout solution problem. Four possible modes ranges electric field strength values corresponding them identified, ranked by their negative impact demulsification process: rebound, into three or multiple drops, electrospraying. includes narrow electrospraying beside “coalescence-non-coalescence” during “rebound-multidrops” transition. A “regime map”—a diagram outcomes depending size drops strength—was formed analyzed summarize results identify most favorable processes. map revealed an area when substituted only rebound drop radius increases, i.e., there will be no smaller after interaction.

Language: Английский

Citations

1