S. Balabani et M. Yianneskis, VORTEX SHEDDING AND TURBULENCE SCALES IN STAGGERED TUBE BUNDLE FLOWS, Canadian journal of chemical engineering, 75(5), 1997, pp. 823-831
Time-resolved LDA measurements of the axial and transverse velocity co
mponents were performed in the first 6 rows of a staggered tube bundle
with relative transverse and longitudinal pitch ratios of 3.6 and 1.6
, respectively. Measurements were carried out in a flow of water at a
Re-d of 12,858. A flow periodicity with a Strouhal number equal to 0.2
6 was detected, which is in agreement with published data. This period
icity was found to broaden the turbulence levels by up to 50% in some
locations. Agreement between the experimental results and previously r
eported CFD predictions using the k-epsilon model improved when this p
eriodic component was removed from the spectra using appropriate filte
ring techniques. In an attempt to describe the turbulence structure mo
re extensively, time-and length-scales and dissipation rates were esti
mated from the filtered time-resolved data. Integral time scales were
on average equal to 4 ms and Taylor microscales 0.7 ms. Comparisons of
the data with numerical predictions show promise for more extensive e
valuation of CFD predictions in future than has been possible hereto.