Dispersion in the large-deviation regime. Part 1: shear flows and periodic flows
Dispersion in the large-deviation regime. Part 1: shear flows and periodic flows
复制标题
大偏差区域的分散。
DOI:
10.1017/jfm.2014.64
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发表时间:
2014
影响因子:
3.7
通讯作者:
Haynes P
中科院分区:
文献类型:
--
作者:
Haynes P
The dispersion of a passive scalar in a fluid through the combined action of advection and molecular diffusion is often described as a diffusive process, with an effective diffusivity that is enhanced compared with the molecular value. However, this description fails to capture the tails of the scalar concentration distribution in initial-value problems. To remedy this, we develop a large-deviation theory of scalar dispersion that provides an approximation to the scalar concentration valid at much larger distances away from the centre of mass, specifically distances that are asymptotic treatment of cellular flows.) The predictions of large-deviation theory are compared with Monte Carlo simulations that estimate the tails of concentration accurately using importance sampling.
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DOI:
10.1090/conm/339
发表时间:
2003-11
期刊:
--
影响因子:
--
作者:
P. Kuchment
通讯作者:
P. Kuchment
影响因子:
1.9
作者:
R. Ellis
通讯作者:
R. Ellis
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
J. Tailleur;J. Kurchan
通讯作者:
J. Kurchan
影响因子:
3.7
作者:
Haynes P
通讯作者:
Haynes P
影响因子:
1.9
作者:
R. Kuske;J. Keller
通讯作者:
J. Keller