ISSN Online: 2377-424X
ISBN Print: 0-85295-345-3
International Heat Transfer Conference 10
MODELING OSCILLATORY LAMINAR, TRANSITIONAL AND TURBULENT CHANNEL FLOWS AND HEAT TRANSFER
Abstract
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.