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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...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2022
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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. |
format | Online Article Text |
id | pubmed-8825840 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
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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