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Multiphase Actuation of AC Electrothermal Micropump

Electrothermal micropumps apply an AC electric field to a conductive fluid within the range of 10 kHz–1 MHz to generate fluid flow. In this frequency range, coulombic forces dominate fluid interactions over opposing dielectric forces, resulting in high flow rates (~50–100 μm/s). To date, the electro...

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Detalles Bibliográficos
Autores principales: Cenaiko, Stirling, Lijnse, Thomas, Dalton, Colin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10145383/
https://www.ncbi.nlm.nih.gov/pubmed/37420991
http://dx.doi.org/10.3390/mi14040758
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author Cenaiko, Stirling
Lijnse, Thomas
Dalton, Colin
author_facet Cenaiko, Stirling
Lijnse, Thomas
Dalton, Colin
author_sort Cenaiko, Stirling
collection PubMed
description Electrothermal micropumps apply an AC electric field to a conductive fluid within the range of 10 kHz–1 MHz to generate fluid flow. In this frequency range, coulombic forces dominate fluid interactions over opposing dielectric forces, resulting in high flow rates (~50–100 μm/s). To date, the electrothermal effect—using asymmetrical electrodes—has been tested only with single-phase and 2-phase actuation, while dielectrophoretic micropumps have shown improved flow rates with 3- and 4-phase actuation. Simulating muti-phase signals in COMSOL Multiphysics requires additional modules and a more involved implementation to accurately represent the electrothermal effect in a micropump. Here, we report detailed simulations of the electrothermal effect under multi-phase conditions, including single-phase, 2-phase, 3-phase and 4-phase actuation patterns. These computational models indicate that 2-phase actuation leads to the highest flow rate, with 3-phase resulting in a 5% reduced flow rate and 4-phase resulting in an 11% reduced flow rate compared to 2-phase. With these modifications to the simulation, various actuation patterns can later be tested in COMSOL for a range of electrokinetic techniques.
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spelling pubmed-101453832023-04-29 Multiphase Actuation of AC Electrothermal Micropump Cenaiko, Stirling Lijnse, Thomas Dalton, Colin Micromachines (Basel) Article Electrothermal micropumps apply an AC electric field to a conductive fluid within the range of 10 kHz–1 MHz to generate fluid flow. In this frequency range, coulombic forces dominate fluid interactions over opposing dielectric forces, resulting in high flow rates (~50–100 μm/s). To date, the electrothermal effect—using asymmetrical electrodes—has been tested only with single-phase and 2-phase actuation, while dielectrophoretic micropumps have shown improved flow rates with 3- and 4-phase actuation. Simulating muti-phase signals in COMSOL Multiphysics requires additional modules and a more involved implementation to accurately represent the electrothermal effect in a micropump. Here, we report detailed simulations of the electrothermal effect under multi-phase conditions, including single-phase, 2-phase, 3-phase and 4-phase actuation patterns. These computational models indicate that 2-phase actuation leads to the highest flow rate, with 3-phase resulting in a 5% reduced flow rate and 4-phase resulting in an 11% reduced flow rate compared to 2-phase. With these modifications to the simulation, various actuation patterns can later be tested in COMSOL for a range of electrokinetic techniques. MDPI 2023-03-29 /pmc/articles/PMC10145383/ /pubmed/37420991 http://dx.doi.org/10.3390/mi14040758 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Cenaiko, Stirling
Lijnse, Thomas
Dalton, Colin
Multiphase Actuation of AC Electrothermal Micropump
title Multiphase Actuation of AC Electrothermal Micropump
title_full Multiphase Actuation of AC Electrothermal Micropump
title_fullStr Multiphase Actuation of AC Electrothermal Micropump
title_full_unstemmed Multiphase Actuation of AC Electrothermal Micropump
title_short Multiphase Actuation of AC Electrothermal Micropump
title_sort multiphase actuation of ac electrothermal micropump
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10145383/
https://www.ncbi.nlm.nih.gov/pubmed/37420991
http://dx.doi.org/10.3390/mi14040758
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