Computational coarse graining of a randomly forced one-dimensional Burgers equation

Sunil Ahuja, Victor Yakhot, Ioannis G. Kevrekidis

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

We explore a computational approach to coarse graining the evolution of the large-scale features of a randomly forced Burgers equation in one spatial dimension. The long term evolution of the solution energy spectrum appears self-similar in time. We demonstrate coarse projective integration and coarse dynamic renormalization as tools that accelerate the extraction of macroscopic information (integration in time, self-similar shapes, nontrivial dynamic exponents) from short bursts of appropriately initialized direct simulation. These procedures solve numerically an effective evolution equation for the energy spectrum without ever deriving this equation in closed form.

Original languageEnglish (US)
Article number035111
JournalPhysics of Fluids
Volume20
Issue number3
DOIs
StatePublished - Mar 2008

All Science Journal Classification (ASJC) codes

  • Computational Mechanics
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

Keywords

  • Computational fluid dynamics
  • Differential equations
  • Turbulence

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