The Forces Acting on Two Equal Circular Cylinders placed in a Uniform Stream at Low Values of Reynolds Number

抄録

The steady slow motion of a viscous fluid past two parallel circular cylinders of equal radius with their axes in one plane perpendicular to a uniform flow is discussed on the basis of Oseen’s linearized equations of motion.
Expansion formulae in powers of Reynolds number R for the forces acting on one of the cylinders are obtained correct to the order of R, the lowest order terms being O(R⁻¹).
After detailed numerical calculations, it is shown that the drag on one cylinder decreases as the distance between the two cylinders decreases and also that each cylinder experiences a repulsive force.