Direct numerical simulations of three-dimensional destabilized 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 is increased, 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 quantifies its heat transfer to within 20% of measured values. Two-dimensional simulations, however, incorrectly predict laminar-like friction factor and heat transfer behaviors.
|Original language||English (US)|
|Number of pages||7|
|Journal||American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD|
|State||Published - Dec 1 1996|
ASJC Scopus subject areas
- Mechanical Engineering
- Fluid Flow and Transfer Processes