Heat transfer enhancement in a transitional channel flow

Mark V. Zagarola, Alexander J. Smits, George E. Karniadakis

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Flow modification by an array of spanwise eddy-promoters oriented normal to the flow direction is sometimes used to enhance the convective heat transfer rate from a heated wall. Here, we study the effect of such eddy-promoters on the heat transfer and dissipation in a fully-developed channel flow with one heated wall, in the laminar and transitional flow regimes. The experiment shows that flows with eddy-promoters result in a significant decrease in dissipation for a given heat transfer rate at all supercritical Reynolds numbers investigated. When the results are compared to other eddy-promoter geometries, they support a scale-matched destabilization method. The primary enhancement mechanism in the subcritical flows is travelling waves, but for supercritical flows vortex shedding is an equally important mechanism.

Original languageEnglish (US)
Pages (from-to)257-267
Number of pages11
JournalJournal of Wind Engineering and Industrial Aerodynamics
Volume49
Issue number1-3
DOIs
StatePublished - Dec 1993

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Renewable Energy, Sustainability and the Environment
  • Mechanical Engineering

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