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Molecular diameters of rarefied gases

Molecular diameters are an important property of gases for numerous scientific and technical disciplines. Different measurement techniques for these diameters exist, each delivering a characteristic value. Their reliability in describing the flow of rarefied gases, however, has not yet been discusse...

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Autores principales: Kunze, S., Groll, R., Besser, B., Thöming, J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8825840/
https://www.ncbi.nlm.nih.gov/pubmed/35136099
http://dx.doi.org/10.1038/s41598-022-05871-y
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author Kunze, S.
Groll, R.
Besser, B.
Thöming, J.
author_facet Kunze, S.
Groll, R.
Besser, B.
Thöming, J.
author_sort Kunze, S.
collection PubMed
description Molecular diameters are an important property of gases for numerous scientific and technical disciplines. Different measurement techniques for these diameters exist, each delivering a characteristic value. Their reliability in describing the flow of rarefied gases, however, has not yet been discussed, especially the case for the transitional range between continuum and ballistic flow. Here, we present a method to describe gas flows in straight channels with arbitrary cross sections for the whole Knudsen range by using a superposition model based on molecular diameters. This model allows us to determine a transition diameter from flow measurement data that paves the way for generalized calculations of gas behaviour under rarefied conditions linking continuum and free molecular regime.
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spelling pubmed-88258402022-02-09 Molecular diameters of rarefied gases Kunze, S. Groll, R. Besser, B. Thöming, J. Sci Rep Article Molecular diameters are an important property of gases for numerous scientific and technical disciplines. Different measurement techniques for these diameters exist, each delivering a characteristic value. Their reliability in describing the flow of rarefied gases, however, has not yet been discussed, especially the case for the transitional range between continuum and ballistic flow. Here, we present a method to describe gas flows in straight channels with arbitrary cross sections for the whole Knudsen range by using a superposition model based on molecular diameters. This model allows us to determine a transition diameter from flow measurement data that paves the way for generalized calculations of gas behaviour under rarefied conditions linking continuum and free molecular regime. Nature Publishing Group UK 2022-02-08 /pmc/articles/PMC8825840/ /pubmed/35136099 http://dx.doi.org/10.1038/s41598-022-05871-y Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Kunze, S.
Groll, R.
Besser, B.
Thöming, J.
Molecular diameters of rarefied gases
title Molecular diameters of rarefied gases
title_full Molecular diameters of rarefied gases
title_fullStr Molecular diameters of rarefied gases
title_full_unstemmed Molecular diameters of rarefied gases
title_short Molecular diameters of rarefied gases
title_sort molecular diameters of rarefied gases
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8825840/
https://www.ncbi.nlm.nih.gov/pubmed/35136099
http://dx.doi.org/10.1038/s41598-022-05871-y
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