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ISSN Online: 2377-424X

ISBN Print: 0-85295-345-3

International Heat Transfer Conference 10
August, 14-18, 1994, Brighton, UK

MODELING OSCILLATORY LAMINAR, TRANSITIONAL AND TURBULENT CHANNEL FLOWS AND HEAT TRANSFER

Get access (open in a dialog) DOI: 10.1615/IHTC10.2850
pages 247-252

Аннотация

An empirical transition model has been utilized to activate a low-Reynolds-number 2-D turbulence model at the appropriate time within the oscillatory flow cycle. Results reported in this paper, examples of the performance of the model are for wall shear stress and wall heat flux; at the axial midplane of a circular tube, for a representative case. Also, 1-D analysis is presented which includes accelerating-flow boundary layer modeling for the early portion of the cycle, the empirical transition model and a post transition model based upon fully-developed turbulent flow and heat transfer. The 1-D model includes an estimate of fluid sink temperature. Comparisons between the 1-D and 2-D predictions and experimental data, were good. These models are designed to replace other, less precise models currently in use for 1-D Stirling Engine design. The results of the present work should be taken with caution, the paucity of experimental data prevents exhaustive verification.