Abstract: Fluctuating pressures, lift and drag of two circular cylinders in tandemarrangements wave investigated experimentally in this paper. The twocylinders, which were made of a PVC pipe and whose surfaces were smooth,were subjected to wave and current flow in the range of 2 40×10 5≤ Re≤5 40×10 5, 2 94≤Kc≤7 85, 2 54≤L/D≤5 02 . The results show that: the flow pattern around the two cylindersin wave and current flow are similar to those in uniform cross flow atsmall Kc numbers, but the interference ...