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| Titel |
Rarefied gas flows through meshes and implications for atmospheric measurements |
| VerfasserIn |
J. Gumbel |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 19, no. 5 ; Nr. 19, no. 5, S.563-569 |
| Datensatznummer |
250014254
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| Publikation (Nr.) |
 copernicus.org/angeo-19-563-2001.pdf |
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| Zusammenfassung |
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.
Key words. Atmospheric composition
and structure (instruments and techniques; middle atmosphere – composition and
chemistry) |
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