TY - GEN
T1 - ON THE CALCULATION OF TURBULENT HEAT TRANSPORT DOWNSTREAM FROM AN ABRUPT PIPE EXPANSION
AU - Chieng, C. C.
AU - Launder, B. E.
PY - 1980/11
Y1 - 1980/11
N2 - A numerical study is reported of flow and heat transfer in the separated flow region created by an abrupt pipe expansion with the standard k ∼ ε model of turbulence. The study has given its main attention to the simulation of the region in the immediate vicinity of the wall where turbulent transport gives way to molecular conduction and diffusion. As in other separated flow studies, wall resistance laws or ″wall functions″ used to bridge this near-wall region are based on the idea that, beyond the viscous sub-layer, the turbulent length scale is universal, increasing linearly with distance from the wall. Attention to detailed modelling, however, has, it appears, produced a more satisfactory set of relations than has formerly been used. Predictions of the experimental data of Zemanick & Dougall for a diameter ratio of 0.54 show generally encouraging agreement with experiment. © 1980 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS.
AB - A numerical study is reported of flow and heat transfer in the separated flow region created by an abrupt pipe expansion with the standard k ∼ ε model of turbulence. The study has given its main attention to the simulation of the region in the immediate vicinity of the wall where turbulent transport gives way to molecular conduction and diffusion. As in other separated flow studies, wall resistance laws or ″wall functions″ used to bridge this near-wall region are based on the idea that, beyond the viscous sub-layer, the turbulent length scale is universal, increasing linearly with distance from the wall. Attention to detailed modelling, however, has, it appears, produced a more satisfactory set of relations than has formerly been used. Predictions of the experimental data of Zemanick & Dougall for a diameter ratio of 0.54 show generally encouraging agreement with experiment. © 1980 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS.
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M3 - RGC 32 - Refereed conference paper (with host publication)
T3 - HTD
SP - 9
EP - 19
BT - Momentum and Heat Transfer Processes in Recirculating Flows
A2 - Launder, B. E.
A2 - Humphery, J. A. C.
PB - American Society of Mechanical Engineers
T2 - Winter Annual Meeting of the American Society of Mechanical Engineers 1980
Y2 - 16 November 1980 through 21 November 1980
ER -