Design and Optimization of Microfluidic Vortex Diode DOI Creative Commons
Krzysztof Tadyszak, Alessandro Jäger, Jiří Pánek

et al.

Mathematical and Computational Applications, Journal Year: 2024, Volume and Issue: 29(6), P. 97 - 97

Published: Oct. 30, 2024

The performed research presents modeling results for designing microfluidic vortex diodes. These devices rectify fluid flow and can be used in many applications on micro macro scales. modeling, utilizing computational dynamics (CFD) with the turbulence model RANS k-ε COMSOL Multiphysics, has led to optimizing diodicity—the reversed-to-forward pressure drop ratio. goal was find best flow-rectifying geometry within 2D vortex-type design by changing wall geometry, diode shape, inflow velocities, identifying significant parameters dependencies. Improving diodicity achieved increasing radius r1 of central channel, entire r2, decreasing width w rectangular reducing its length L. Additionally, circular shape an elliptical one improve diodicity. significance this is evident potential these setups where fixed-geometry unidirectional required, e.g., mixing, filtration, cell separation, drug delivery, or industrial scales, energy harvesting, wastewater treatment, water sterilization.

Language: Английский

Enhancing Micro-Droplet Mixing in Microfluidic Systems Via Electrowetting-Induced Parametric Oscillations DOI Creative Commons
Yaming Wei, Jianfeng Zou,

Ziting Zhao

et al.

Aerospace Research Communications, Journal Year: 2025, Volume and Issue: 2

Published: Jan. 9, 2025

In the context of space exploration, electrowetting-on-dielectric (EWOD) microfluidic systems hold substantial promise for enhancing in-situ analysis and experimentation, particularly given its potential precise control fluid dynamics in microgravity environment. This study investigates effects electrowetting-induced parametric oscillations on mixing efficiency within coalesced micro-droplets EWOD devices using numerical simulations. The mechanism by which oscillation affects process is unraveled, previously uninverstigated literature to best our knowledge. simulations reveal that significantly increase vorticity magnitude shear rate around droplet interface, leading improved compared free oscillation. Notably, identifies fluctuations index associated with oscillation-induced shape changes droplets. These findings underscore as a strategy optimizing systems, implications design more efficient devices.

Language: Английский

Citations

0
Electrowetting-induced parametric instability of a merged micro-droplet DOI
Yaming Wei, Jianfeng Zou,

Ziting Zhao

et al.

Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(1)

Published: Jan. 1, 2025

Numerical simulations are employed to investigate the electrowetting-induced parametric instability in merged micro-droplets. By subjecting two droplets an alternating current voltage (AC voltage) open electrowetting-on-dielectric microfluidics, we observe triggering of at specific frequencies and amplitudes, manifesting as periodic lateral upper waves. The work aims delineate characteristics onset conditions this electrowetting devices. Notably, droplet assumes a star-like shape due wave formation, with both waves sharing same oscillating frequency being sub-harmonic driving frequency. dispersion relation for resonance mode is enhanced modification parameter. modified phase diagram, derived from theorem, aligns well numerical results various cases. interplay between theoretically analyzed using theory Dong et al. star-shaped liquid puddles. Our study reveals that low aspect ratio may not exhibit despite excitation parameters aligning diagram predictions. Geometric constraints surface tension play limiting role activation modes. This has implications optimizing size electrowetting-based devices manage instabilities, potentially leading more efficient reliable designs.

Language: Английский

Citations

0
Controlled preparation of hollow n-Al/Fe2O3 MICs microspheres by two-droplet microfluidic technique and performance study DOI
Tong Wang, Jiawei Li,

Jiafei Li

et al.

Ceramics International, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Language: Английский

Citations

0
Computational Fluid–Structure Interaction in Microfluidics DOI Creative Commons

Hafiz Muhammad Musharaf,

Uditha Roshan,

Amith Mudugamuwa

et al.

Micromachines, Journal Year: 2024, Volume and Issue: 15(7), P. 897 - 897

Published: July 9, 2024

Micro elastofluidics is a transformative branch of microfluidics, leveraging the fluid–structure interaction (FSI) at microscale to enhance functionality and efficiency various microdevices. This review paper elucidates critical role advanced computational FSI methods in field micro elastofluidics. By focusing on interplay between fluid mechanics structural responses, these facilitate intricate design optimisation microdevices such as microvalves, micropumps, micromixers, which rely precise control fluidic dynamics. In addition, tools extend development biomedical devices, enabling particle manipulation enhancing therapeutic outcomes cardiovascular applications. Furthermore, this addresses current challenges highlights necessity for further tackle complex, time-dependent models under microfluidic environments varying conditions. Our expanding potential elastofluidics, offering roadmap future research promising area.

Language: Английский

Citations

3
Design and Optimization of Microfluidic Vortex Diode DOI Creative Commons
Krzysztof Tadyszak, Alessandro Jäger, Jiří Pánek

et al.

Mathematical and Computational Applications, Journal Year: 2024, Volume and Issue: 29(6), P. 97 - 97

Published: Oct. 30, 2024

The performed research presents modeling results for designing microfluidic vortex diodes. These devices rectify fluid flow and can be used in many applications on micro macro scales. modeling, utilizing computational dynamics (CFD) with the turbulence model RANS k-ε COMSOL Multiphysics, has led to optimizing diodicity—the reversed-to-forward pressure drop ratio. goal was find best flow-rectifying geometry within 2D vortex-type design by changing wall geometry, diode shape, inflow velocities, identifying significant parameters dependencies. Improving diodicity achieved increasing radius r1 of central channel, entire r2, decreasing width w rectangular reducing its length L. Additionally, circular shape an elliptical one improve diodicity. significance this is evident potential these setups where fixed-geometry unidirectional required, e.g., mixing, filtration, cell separation, drug delivery, or industrial scales, energy harvesting, wastewater treatment, water sterilization.

Language: Английский

Citations

1