Rarefied gas flows through meshes and implications for atmospheric measurements
Meshes are commonly used as part of instruments for in situ atmospheric measurements. This study analyses the aerodynamic effect of meshes by means of wind tunnel experiments and numerical simulations. Based on the Direct Simulation Monte Carlo method, a simple mesh parameterisation is described...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2001-05-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/19/563/2001/angeo-19-563-2001.pdf |
| _version_ | 1819128773891588096 |
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| author | J. Gumbel |
| author_facet | J. Gumbel |
| author_sort | J. Gumbel |
| collection | DOAJ |
| description | Meshes are commonly used
as part of instruments for in situ atmospheric measurements. This study analyses
the aerodynamic effect of meshes by means of wind tunnel experiments and
numerical simulations. Based on the Direct Simulation Monte Carlo method, a
simple mesh parameterisation is described and applied to a number of
representative flow conditions. For open meshes freely exposed to the flow,
substantial compression effects are found both upstream and downstream of the
mesh. Meshes attached to close instrument structures, on the other hand, cause
only minor flow disturbances. In an accompanying paper, the approach developed
here is applied to the quantitative analysis of rocket-borne density
measurements in the middle atmosphere.<br><br><b>Key words. </b>Atmospheric composition
and structure (instruments and techniques; middle atmosphere – composition and
chemistry) |
| first_indexed | 2024-12-22T08:33:09Z |
| format | Article |
| id | doaj.art-90ee7965d7d342d29249cbef95c2c86b |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-12-22T08:33:09Z |
| publishDate | 2001-05-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-90ee7965d7d342d29249cbef95c2c86b2022-12-21T18:32:26ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762001-05-011956356910.5194/angeo-19-563-2001Rarefied gas flows through meshes and implications for atmospheric measurementsJ. Gumbel0Department of Meteorology, Stockholm University, 10691 Stockholm, SwedenMeshes are commonly used as part of instruments for in situ atmospheric measurements. This study analyses the aerodynamic effect of meshes by means of wind tunnel experiments and numerical simulations. Based on the Direct Simulation Monte Carlo method, a simple mesh parameterisation is described and applied to a number of representative flow conditions. For open meshes freely exposed to the flow, substantial compression effects are found both upstream and downstream of the mesh. Meshes attached to close instrument structures, on the other hand, cause only minor flow disturbances. In an accompanying paper, the approach developed here is applied to the quantitative analysis of rocket-borne density measurements in the middle atmosphere.<br><br><b>Key words. </b>Atmospheric composition and structure (instruments and techniques; middle atmosphere – composition and chemistry)https://www.ann-geophys.net/19/563/2001/angeo-19-563-2001.pdf |
| spellingShingle | J. Gumbel Rarefied gas flows through meshes and implications for atmospheric measurements Annales Geophysicae |
| title | Rarefied gas flows through meshes and implications for atmospheric measurements |
| title_full | Rarefied gas flows through meshes and implications for atmospheric measurements |
| title_fullStr | Rarefied gas flows through meshes and implications for atmospheric measurements |
| title_full_unstemmed | Rarefied gas flows through meshes and implications for atmospheric measurements |
| title_short | Rarefied gas flows through meshes and implications for atmospheric measurements |
| title_sort | rarefied gas flows through meshes and implications for atmospheric measurements |
| url | https://www.ann-geophys.net/19/563/2001/angeo-19-563-2001.pdf |
| work_keys_str_mv | AT jgumbel rarefiedgasflowsthroughmeshesandimplicationsforatmosphericmeasurements |