1984 Volume 10 Issue 3 Pages 377-382
Flow pattern and mass transfer characteristics around two cylinders in tandem arrangement were studied for a range of Reynolds number between 800 and 10, 000. The mass transfer coefficients were determined by the electrochemical method, and flow observations were performed by hydrogen bubbles and electric dye-production methods.
The mean Sherwood number of the downstream cylinder varies with the pitch ratio at Reynolds numbers less than about 800 but not at higher Reynolds numbers. This variation is closely related to the behavior of separated shear layer from the upstream cylinder.
A comparison of the Sherwood numbers for two cylinders and tube banks indicates that the local Sherwood numbers are different. This difference is due to the flow patterns, i.e., the mainstream in the tube banks is accelerated by the existence of the cylinders arranged perpendicular to the mainstream direction but the mainstream in the two cylinders has no acceleration.
