| Issue |
Europhys. Lett.
Volume 43, Number 5, September I 1998
|
|
|---|---|---|
| Page(s) | 522 - 526 | |
| Section | Classical areas of phenomenology | |
| DOI | https://doi.org/10.1209/epl/i1998-00392-7 | |
| Published online | 01 September 2002 | |
Noise small-correlation-time effects on the dispersion of passive scalars
1
INFM - Dipartimento di Fisica, Università “La Sapienza” - I-00185 Roma, Italy
2
CNRS, Observatoire de Nice, B.P. 4229 - 06304 Nice Cedex 4, France
INFM - Dipartimento di Fisica, Università di Genova - I-16146 Genova, Italy
Received:
22
May
1998
Accepted:
8
July
1998
The effect of a small correlation time, τ, of the (colored-) small-scales noise on the effective diffusivities for the transport of passive scalars is investigated. It has recently been shown that the presence of τ makes the transport problem equivalent to the white-in-time case provided by a renormalized advecting velocity field. This equivalence is here exploited to investigate, both analytically and perturbatively in the Strouhal number of the advecting velocity field, the mechanism responsible for enhancement of transport.
PACS: 47.27.Qb – Turbulent diffusion
© EDP Sciences, 1998
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.