Interference Drag Between Cylindrical Particles in Stokes Flow

Abstract

In this study, the interference effects when two cylinders are placed in series or parallel ina low Reynolds number flow are predicted. For two cylinders with their line of centersperpendicular to the flow, the drag force is lower than an isolated cylinder at small gaps butis greater at large gaps; a maximum is found at a gap of approximately of 7 cylinderdiameters. For cylinders with their line of centers parallel to the flow, the drag on the trailingbody is less than the leading body, which in turn is less than the drag on an isolated cylinder