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Log-Correlated Large-Deviation Statistics Governing Huygens Fronts in Turbulence

Journal Article · · Journal of Statistical Physics
 [1];  [2]
  1. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
  2. Danville, CA (United States)
Analyses have disagreed on whether the velocity uT of bulk advancement of a Huygens front in turbulence vanishes or remains finite in the limit of vanishing local front propagation speed u0. Here, a connection to the large-deviation statistics of log-correlated random processes enables a definitive determination of the correct small-u0 asymptotics. This result reconciles several theoretical and phenomenological perspectives with the conclusion that uT remains finite for vanishing u0, which implies a propagation anomaly akin to the energy-dissipation anomaly in the limit of vanishing viscosity. Various leading-order structural properties such as a novel u0 dependence of a bulk length scale associated with front geometry are predicted in this limit. As a result, the analysis involves a formal analogy to random advection of diffusive scalars.
Research Organization:
Sandia National Laboratories (SNL-CA), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1529002
Report Number(s):
SAND--2019-5017J; 675258
Journal Information:
Journal of Statistical Physics, Journal Name: Journal of Statistical Physics Journal Issue: 2 Vol. 17; ISSN 0022-4715
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English

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The speed of traveling waves in a FKPP-Burgers system text January 2020

Figures / Tables (2)


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