Sedimentation can result in the growth of rough interfaces.
Although sedimentation has been widely investigated in various areas of geology and engineering, the rough interface aspect of sedimentation is still unstudied. Since hydrodynamic forces are in principle long range, rough interfaces formed through sedimentation provide a significantly different growth situation for comparison with other studies of apparently similar final interfaces. In the sedimentation experiment discussed in this paper all measurements have been performed with closed cells. To examine the effects of viscosity each cell was filled with one of three different viscous liquids. The various cell sizes used and corresponding liquids are given in Table 1 .