An experimental investigation of the settling behavior of two spheres in a power law fluid

► We examine the settling behavior of two spheres in two different arrangements in power law fluid. ► We examined the impact of the initial separation distance between spheres on their behavior. ► The velocity ratio decreased as the separation distance increased. ► The behavior for the in line spheres was similar to that in a Newtonian fluid. ► The behavior of the side by side spheres was not similar to that in a Newtonian fluid.