Abstract : The research efforts carried out at ARAP during the past five years in the field of viscous vortex motions are summarized. The work cited constitutes a rather extensive program of theoretical and experimental studies of vortex motions in general and of three-dimensional laminar and turbulent incompressible driven vortices in particular. The theoretical studies fall into three general categories; the first and most important comprising velocity distributions for steady laminar motion, the second dealing with unsteady velocity characteristics, and the third treating temperature distributions for the steady motions first considered. An evaluation and discussion of the effects of turbulence in real flows of the general type under consideration is included. The work performed and the results and conclusions reached in each of the areas of study already mentioned are discussed.