For citation:
Saichev I. S., Saichev A. I. Fluctuations of contours of passive tracer equal concentration in turbulent medium. Izvestiya VUZ. Applied Nonlinear Dynamics, 2000, vol. 8, iss. 5, pp. 15-22. DOI: 10.18500/0869-6632-2000-8-5-15-22
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Russian
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Article
UDC:
532.591
Fluctuations of contours of passive tracer equal concentration in turbulent medium
Autors:
Saichev Irina Semenovna, Lobachevsky State University of Nizhny Novgorod
Saichev Alexandr Ivanovich, Lobachevsky State University of Nizhny Novgorod
Abstract:
In view of problems of atmosphere and ocean physics, statistical properties of contours length of passive tracer equal concentration and of the concentration field total gradient in chaotically moving incompressible medium are studied. Expressions for statistical moments of these processes and also the probability distribution of total gradient are derived. It is shown that moments grow exponentially in time and distribution tends to logarithmically normal one.
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Acknowledgments:
The work was supported by the grant INTAS № 97-11134, grant RFBR № 00-02-16167, grant «Leading scientific schools of Russia» № 00-15-96619, and grant from the Royal Swedish Academy of Sciences.
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Received:
26.08.2000
Accepted:
21.12.2000
Published:
07.02.2001
Journal issue:
- 225 reads