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Investigation of Visco-rheological Properties of Polymeric Fluid on Electrothermal Pumping

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Název: Investigation of Visco-rheological Properties of Polymeric Fluid on Electrothermal Pumping
Autoři: Nima Hedayati, Abas Ramiar, Kurosh Sedighi
Zdroj: Journal of Applied and Computational Mechanics, Vol 10, Iss 1, Pp 164-182 (2024)
Informace o vydavateli: Shahid Chamran University of Ahvaz, 2024.
Rok vydání: 2024
Sbírka: LCC:Mechanics of engineering. Applied mechanics
Témata: electrothermal, viscoelastic fluids, microfluid, polymer solution, ptt model, Mechanics of engineering. Applied mechanics, TA349-359
Popis: Electrothermal pumping is a recently trending method to force highly conductive fluids in a wide range of microfluidics applications with biological processes. Although most polymer fluids (biological and synthetic) are highly conductive exhibiting viscoelastic rheological properties that are relevant to biomedical applications, their behavior under the effect of electrothermal force has not yet been studied. To this aim, the PTT model (non-linear rheological constitutive equation) and electrothermal equations are implemented in the developed OpenFOAM solver. The effect of rheological characteristics of the fluids on the physical parameters such as velocity, elastic behavior, and vortices strength of electrothermal flow are investigated through the viscoelastic non-dimensional numbers. According to the results, electrothermal outlet velocity decreases by 726% as the retardation ratio (β number) increases from 0.2 to 0.9 and increases by 107% as the Weissenberg number raises from 0.001 to 10. Investigating all non-dimensional numbers simultaneously leads to the conclusion that higher electrothermal velocity is achieved by viscoelastic fluids with lower viscosity and higher relaxation time. This fact is useful for choosing the proper fluid for a particular application. As a practical example, 3000 ppm polyethylene oxide solution results in higher velocity in electrothermal flow compared to the 5% polyvinylpyrrolidone and 2000 ppm xanthan gum solution.
Druh dokumentu: article
Popis souboru: electronic resource
Jazyk: English
ISSN: 2383-4536
Relation: https://jacm.scu.ac.ir/article_18521_6af41c034b753cdcfe775318497ec7f5.pdf; https://doaj.org/toc/2383-4536
DOI: 10.22055/jacm.2023.44214.4180
Přístupová URL adresa: https://doaj.org/article/6d9e55e29b0847e0b7bbf75f76f1bb10
Přístupové číslo: edsdoj.6d9e55e29b0847e0b7bbf75f76f1bb10
Databáze: Directory of Open Access Journals
Popis
Abstrakt:Electrothermal pumping is a recently trending method to force highly conductive fluids in a wide range of microfluidics applications with biological processes. Although most polymer fluids (biological and synthetic) are highly conductive exhibiting viscoelastic rheological properties that are relevant to biomedical applications, their behavior under the effect of electrothermal force has not yet been studied. To this aim, the PTT model (non-linear rheological constitutive equation) and electrothermal equations are implemented in the developed OpenFOAM solver. The effect of rheological characteristics of the fluids on the physical parameters such as velocity, elastic behavior, and vortices strength of electrothermal flow are investigated through the viscoelastic non-dimensional numbers. According to the results, electrothermal outlet velocity decreases by 726% as the retardation ratio (β number) increases from 0.2 to 0.9 and increases by 107% as the Weissenberg number raises from 0.001 to 10. Investigating all non-dimensional numbers simultaneously leads to the conclusion that higher electrothermal velocity is achieved by viscoelastic fluids with lower viscosity and higher relaxation time. This fact is useful for choosing the proper fluid for a particular application. As a practical example, 3000 ppm polyethylene oxide solution results in higher velocity in electrothermal flow compared to the 5% polyvinylpyrrolidone and 2000 ppm xanthan gum solution.
ISSN:23834536
DOI:10.22055/jacm.2023.44214.4180