Effect of Microchannel Curvature on Water Droplet Dynamics in a Highly Viscous Flow DOI
Doston Shayunusov, Dmitry Eskin, Hongbo Zeng

и другие.

Industrial & Engineering Chemistry Research, Год журнала: 2024, Номер 63(31), С. 13881 - 13894

Опубликована: Июль 25, 2024

This work is dedicated to the three-dimensional (3D) computational fluid dynamics (CFD) simulations of microchannel curvature effect on water droplet in a highly viscous flow. Dynamics 10 μm droplets bitumen medium flowing through U-shaped tubes square-cross-section and h = 40 width investigated. The channel radius R varies from 0.25h 2h inlet Reynolds number Rein 2 10. coupled level-set volume (CLSVOF) methods are combined with adaptive mesh refinement (AMR) technique accurately simulate flow regime. Different geometry performances compared using one-dimensional (1D) diagrams for integral characteristics 3D visualization liquid–liquid interface. Flows vicinities convex concave walls found control deformation breakup patterns. results reveal that at ≥ 7, causes temporary coalescence associated formation long worm-shaped droplets. Differently positioned each Rein, bend radius, interfacial tension cases assessed individually. As result, behavior map developed based local capillary numbers.

Язык: Английский

A coupled LBM-LES-DEM particle flow modeling for microfluidic chip and ultrasonic-based particle aggregation control method DOI
Lin Li, Pu Xu, Qihan Li

и другие.

Applied Mathematical Modelling, Год журнала: 2025, Номер unknown, С. 116025 - 116025

Опубликована: Фев. 1, 2025

Язык: Английский

Процитировано

17

Constructal design of a rectangular porous fin considering minimization of maximum temperature difference and pumping power consumption DOI

XiaoYe Liu,

Huijun Feng,

Lingen Chen

и другие.

Science China Technological Sciences, Год журнала: 2023, Номер 67(3), С. 919 - 929

Опубликована: Дек. 6, 2023

Язык: Английский

Процитировано

35

Constructal design of printed circuit recuperator for S-CO2 cycle via multi-objective optimization algorithm DOI

Zhisong Dan,

Huijun Feng,

Lingen Chen

и другие.

Science China Technological Sciences, Год журнала: 2023, Номер 67(1), С. 285 - 294

Опубликована: Дек. 6, 2023

Язык: Английский

Процитировано

32

Constructal design of a rectangular parallel phase change microchannel in a three-dimensional electronic device DOI

JiWen Zhang,

Huijun Feng,

Lingen Chen

и другие.

Science China Technological Sciences, Год журнала: 2023, Номер 67(5), С. 1381 - 1390

Опубликована: Дек. 8, 2023

Язык: Английский

Процитировано

25

Enhanced mixing efficiency and reduced droplet size with novel droplet generators DOI Creative Commons
Ali Kheirkhah Barzoki

Scientific Reports, Год журнала: 2024, Номер 14(1)

Опубликована: Фев. 27, 2024

Abstract Nowadays, droplet microfluidics has become widely utilized for high-throughput assays. Efficient mixing is crucial initiating biochemical reactions in many applications. Rapid during formation eliminates the need incorporating micromixers, which can complicate chip design. Furthermore, immediate of substances upon contact significantly improve consistency chemical and resulting products. This study introduces three innovative designs generators that achieve efficient produce small droplets. The T-cross cross-T geometries combine cross T junction mechanisms, improved efficiency. Numerical simulations were conducted to compare these novel with traditional junctions terms index, diameter, eccentricity. geometry exhibited highest index produced smallest For flow rate ratio 0.5, this offered a 10% increase decrease diameter by compared junction. While best efficiency among generators, it produces larger droplets, risk contamination due microchannel walls. Therefore, highly desirable most applications its production considerably smaller asymmetric 8% around 2% conventional 0.5. All demonstrated comparable lowest droplets (around 1%). Thus, geometries, particularly geometry, are favorable choice where both high sizes important.

Язык: Английский

Процитировано

9

Optimization of passive micromixers: effects of pillar configuration and gaps on mixing efficiency DOI Creative Commons
Ali Kheirkhah Barzoki

Scientific Reports, Год журнала: 2024, Номер 14(1)

Опубликована: Июль 15, 2024

Chemical bioreactions play a significant role in many of the microfluidic devices, and their applications biomedical science have seen substantial growth. Given that effective mixing is vital for initiating biochemical reactions applications, micromixers become increasingly prevalent high-throughput assays. In this research, numerical study using finite element method was conducted to examine fluid flow mass transfer characteristics novel featuring an array pillars. The utilized two-dimensional geometries. impact pillar configuration on performance evaluated concentration distribution index as key metrics. explores effects design pressure drop, drawing from principles such contraction-expansion split-recombine. Two configurations arrays, slanted arrowhead, are introduced, each undergoing investigation regarding parameters diameter, gap size between groups, distance pillars, vertical shift groups. Subsequently, optimal identified, exhibiting efficiency exceeding 99.7% at moderate Reynolds number (Re = 1), level typically challenging attain high efficiency. Notably, drop remains low 1102 Pa. Furthermore, variations over time across different positions along channel examined. Both demonstrate short lengths times. At 4300 μm inlet, arrowhead yielded indices 97.2% 98.9%, respectively. could provide 99.5% channel's end within 8 s. Additionally, both exceeded 90% by 3 combination rapid mixing, length highly promising applications.

Язык: Английский

Процитировано

4

Comparative Analysis of Flow behavior During the nanofluid Phase Transition at Serpentine Microchannel Bends DOI
Juhui Chen,

Xu Hanchi,

Dan Li

и другие.

Chemical Engineering and Processing - Process Intensification, Год журнала: 2025, Номер unknown, С. 110298 - 110298

Опубликована: Апрель 1, 2025

Язык: Английский

Процитировано

0

Characterization of the oil water two phase flow in a novel microchannel contactor equipped with helical wire static mixer DOI Creative Commons

Sobhan Farahani,

Salman Movahedirad, Mohammad Amin Sobati

и другие.

Scientific Reports, Год журнала: 2024, Номер 14(1)

Опубликована: Окт. 8, 2024

This study investigates an oil/water two-phase system to assess the potential efficacy of a novel passive mixer in enhancing liquid-liquid interfacial area within micro-channel contactor. In this system, two fluids are introduced into microchannel with diameter 800 μm and length 20 cm, which is equipped stainless-steel helical wire measuring 250 diameter. Throughout experiments, both supplied at equal flow rates, dominant forces, including attachment detachment examined. The results reveal critical Weber number 3.8 × 10

Язык: Английский

Процитировано

1

Numerical investigation of mixing efficiency in Janus micro-mixer using lattice Boltzmann method DOI Open Access
Zhaomiao Liu,

Kai Shi,

Fanming Cai

и другие.

Physics of Fluids, Год журнала: 2023, Номер 35(7)

Опубликована: Июль 1, 2023

Droplet micro-mixing is a critical aspect limiting the accuracy of chemical analysis and quality drug screening, requiring efficient mixing target concentrations in limited volume. In this paper, ternary dilute solute lattice Boltzmann model used to study processes mechanisms solutes inside Janus droplets. The influence three factors including droplet velocity, tilt angle volume ratio on efficiency examined. results show that there main circulation “dead zone” droplet. With increasing both intensity occupied increase, which make increase. At different angles, difference strength internal flow field makes “windward part” greater than “leeward part.” When keeping r-phase constant g-phase, diffusion distance shortened reduced. competes with reinforcing effect field, finally shows tendency larger r: g, faster mix complete. will provide theoretical support for further improvement micro-mixer efficiency.

Язык: Английский

Процитировано

1

Effect of Microchannel Curvature on Water Droplet Dynamics in a Highly Viscous Flow DOI
Doston Shayunusov, Dmitry Eskin, Hongbo Zeng

и другие.

Industrial & Engineering Chemistry Research, Год журнала: 2024, Номер 63(31), С. 13881 - 13894

Опубликована: Июль 25, 2024

This work is dedicated to the three-dimensional (3D) computational fluid dynamics (CFD) simulations of microchannel curvature effect on water droplet in a highly viscous flow. Dynamics 10 μm droplets bitumen medium flowing through U-shaped tubes square-cross-section and h = 40 width investigated. The channel radius R varies from 0.25h 2h inlet Reynolds number Rein 2 10. coupled level-set volume (CLSVOF) methods are combined with adaptive mesh refinement (AMR) technique accurately simulate flow regime. Different geometry performances compared using one-dimensional (1D) diagrams for integral characteristics 3D visualization liquid–liquid interface. Flows vicinities convex concave walls found control deformation breakup patterns. results reveal that at ≥ 7, causes temporary coalescence associated formation long worm-shaped droplets. Differently positioned each Rein, bend radius, interfacial tension cases assessed individually. As result, behavior map developed based local capillary numbers.

Язык: Английский

Процитировано

0