Here, the laminar fluid flow in small-scale ring chamber centrifuges is investigated to describe the separation behavior of oil aerosols by means of models and laws of similitude. The key objective is the determination of the separation efficiency dependent on the centrifugal geometry, the material properties of the continuous and disperse phases as well as operational parameters such as angular velocity and volume flow. Experimental investigations were conducted to assess the range of validity, the usability and the accuracy of the models.