Abstract
Direct numerical simulations of three-dimensional flow and augmented convective heat transfer in a transversely grooved channel are presented for the Reynolds number range 140 < Re < 2000. These calculations employ the spectral element technique. Multiple flow transitions are documented as the Reynolds number increases, from steady two-dimensional flow through broad-banded unsteady three-dimensional mixing. Three-dimensional simulations correctly predict the Reynolds-number-independent friction factor behavior of this flow and quantify its heat transfer to within 16 percent of measured values. Two-dimensional simulations, however, incorrectly predict laminar-like friction factor and heat transfer behaviors.
Original language | English (US) |
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Pages (from-to) | 717-723 |
Number of pages | 7 |
Journal | Journal of Heat Transfer |
Volume | 120 |
Issue number | 3 |
DOIs | |
State | Published - Aug 1998 |
Externally published | Yes |
Keywords
- Augmentation and Enhancement
- Flow transition
- Heat exchangers
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering