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Critical Pressure Asymmetry in the Enclosed Fluid Diode

[Image: see text] Joint physically and chemically pattered surfaces can provide efficient and passive manipulation of fluid flow. The ability of many of these surfaces to allow only unidirectional flow means they are often termed fluid diodes. Synthetic analogues of these are enabling technologies f...

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Autores principales: Panter, Jack R., Gizaw, Yonas, Kusumaatmaja, Halim
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2020
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7467749/
https://www.ncbi.nlm.nih.gov/pubmed/32486645
http://dx.doi.org/10.1021/acs.langmuir.0c01039
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author Panter, Jack R.
Gizaw, Yonas
Kusumaatmaja, Halim
author_facet Panter, Jack R.
Gizaw, Yonas
Kusumaatmaja, Halim
author_sort Panter, Jack R.
collection PubMed
description [Image: see text] Joint physically and chemically pattered surfaces can provide efficient and passive manipulation of fluid flow. The ability of many of these surfaces to allow only unidirectional flow means they are often termed fluid diodes. Synthetic analogues of these are enabling technologies from sustainable water collection via fog harvesting to improved wound dressings. One key fluid diode geometry features a pore sandwiched between two absorbent substrates—an important design for applications that require liquid capture while preventing back-flow. However, the enclosed pore is particularly challenging to design as an effective fluid diode due to the need for both a low Laplace pressure for liquid entering the pore and a high Laplace pressure to liquid leaving. Here, we calculate the Laplace pressure for fluid traveling in both directions on a range of conical pore designs with a chemical gradient. We show that this chemical gradient is in general required to achieve the largest critical pressure differences between incoming and outgoing liquids. Finally, we discuss the optimization strategy to maximize this critical pressure asymmetry.
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spelling pubmed-74677492020-09-03 Critical Pressure Asymmetry in the Enclosed Fluid Diode Panter, Jack R. Gizaw, Yonas Kusumaatmaja, Halim Langmuir [Image: see text] Joint physically and chemically pattered surfaces can provide efficient and passive manipulation of fluid flow. The ability of many of these surfaces to allow only unidirectional flow means they are often termed fluid diodes. Synthetic analogues of these are enabling technologies from sustainable water collection via fog harvesting to improved wound dressings. One key fluid diode geometry features a pore sandwiched between two absorbent substrates—an important design for applications that require liquid capture while preventing back-flow. However, the enclosed pore is particularly challenging to design as an effective fluid diode due to the need for both a low Laplace pressure for liquid entering the pore and a high Laplace pressure to liquid leaving. Here, we calculate the Laplace pressure for fluid traveling in both directions on a range of conical pore designs with a chemical gradient. We show that this chemical gradient is in general required to achieve the largest critical pressure differences between incoming and outgoing liquids. Finally, we discuss the optimization strategy to maximize this critical pressure asymmetry. American Chemical Society 2020-06-02 2020-07-07 /pmc/articles/PMC7467749/ /pubmed/32486645 http://dx.doi.org/10.1021/acs.langmuir.0c01039 Text en Copyright © 2020 American Chemical Society This is an open access article published under a Creative Commons Attribution (CC-BY) License (http://pubs.acs.org/page/policy/authorchoice_ccby_termsofuse.html) , which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
spellingShingle Panter, Jack R.
Gizaw, Yonas
Kusumaatmaja, Halim
Critical Pressure Asymmetry in the Enclosed Fluid Diode
title Critical Pressure Asymmetry in the Enclosed Fluid Diode
title_full Critical Pressure Asymmetry in the Enclosed Fluid Diode
title_fullStr Critical Pressure Asymmetry in the Enclosed Fluid Diode
title_full_unstemmed Critical Pressure Asymmetry in the Enclosed Fluid Diode
title_short Critical Pressure Asymmetry in the Enclosed Fluid Diode
title_sort critical pressure asymmetry in the enclosed fluid diode
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7467749/
https://www.ncbi.nlm.nih.gov/pubmed/32486645
http://dx.doi.org/10.1021/acs.langmuir.0c01039
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