Nonsteady dynamics of turbulent axisymmetric jets in stratified fluid: Part 1. Experimental study

The nonsteady dynamics of turbulent axially symmetrical jets in stratified fluid with a great density gradient (pycnocline) is studied in laboratory experiments in the large test reservoir with artificial temperature stratification at the Institute of Applied Physics, Russian Academy of Sciences (IA...

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Published inIzvestiya. Atmospheric and oceanic physics Vol. 48; no. 4; pp. 409 - 417
Main Authors Ezhova, E. V., Sergeev, D. A., Kandaurov, A. A., Troitskaya, Yu. I.
Format Journal Article
LanguageEnglish
Published Dordrecht SP MAIK Nauka/Interperiodica 01.07.2012
Springer Nature B.V
Subjects
Atmospheric circulation
Climatology
Earth and Environmental Science
Earth Sciences
Geophysics/Geodesy
Internal waves
Jets
Marine
Stratigraphy
Temperature
Turbulent flow
Underwater
oscillation mode
turbulent jets
stratification
internal waves
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Summary:The nonsteady dynamics of turbulent axially symmetrical jets in stratified fluid with a great density gradient (pycnocline) is studied in laboratory experiments in the large test reservoir with artificial temperature stratification at the Institute of Applied Physics, Russian Academy of Sciences (IAP RAS) simulating wastewater flows from underwater collectors in coastal cities. An underwater survey of jets in the pycnocline region has been carried out along with synchronous measurements of internal waves. It is shown that a jet quasiperiodically oscillates in a vertical plane, thus effectively generating internal waves when interacting with the pycnocline. It is ascertained that the axially symmetrical mode of jet oscillations is a source of internal waves.
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ISSN:0001-4338
1555-628X
DOI:10.1134/S0001433812040081