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| Titel |
A theoretical model of a wake of a body towed in a stratified fluid at large Reynolds and Froude numbers |
| VerfasserIn |
Y. I. Troitskaya, O. A. Druzhinin, D. A. Sergeev, V. V. Papko, G. N. Balandina |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 13, no. 3 ; Nr. 13, no. 3 (2006-06-30), S.247-253 |
| Datensatznummer |
250011768
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| Publikation (Nr.) |
 copernicus.org/npg-13-247-2006.pdf |
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| Zusammenfassung |
| The objective of the present paper is to develop a theoretical model
describing the evolution of a turbulent wake behind a towed sphere in a
stably stratified fluid at large Froude and Reynolds numbers. The wake flow
is considered as a quasi two-dimensional (2-D) turbulent jet flow whose
dynamics is governed by the momentum transfer from the mean flow to a
quasi-2-D sinuous mode growing due to hydrodynamic instability. The model
employs a quasi-linear approximation to describe this momentum transfer. The
model scaling coefficients are defined with the use of available
experimental data, and the performance of the model is verified by
comparison with the results of a direct numerical simulation of a 2-D
turbulent jet flow. The model prediction for the temporal development of the
wake axis mean velocity is found to be in good agreement with the
experimental data obtained by Spedding (1997). |
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