Front propagation in infinite cylinders. II. the sharp reaction zone limit

Cyrill Muratov, M. Novaga

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

This paper applies the variational approach developed in part I of this work [22] to a singular limit of reaction-diffusion-advection equations which arise in combustion modeling. We first establish existence, uniqueness, monotonicity, asymptotic decay, and the associated free boundary problem for special traveling wave solutions which are minimizers of the considered variational problem in the singular limit. We then show that the speed of the minimizers of the approximating problems converges to the speed of the minimizer of the singular limit. Also, after an appropriate translation the minimizers of the approximating problems converge strongly on compacts to the minimizer of the singular limit. In addition, we obtain matching upper and lower bounds for the speed of the minimizers in the singular limit in terms of a certain area-type functional for small curvatures of the free boundary. The conclusions of the analysis are illustrated by a number of numerical examples.

Original languageEnglish (US)
Pages (from-to)521-547
Number of pages27
JournalCalculus of Variations and Partial Differential Equations
Volume31
Issue number4
DOIs
StatePublished - Apr 1 2008

All Science Journal Classification (ASJC) codes

  • Analysis
  • Applied Mathematics

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