An experimental technique for the creation of any statically stable density profile is presented. This technique is essentially a generalized, unsteady version of the ‘‘twotank’’ method that is well known to the stratified flow community. It involves specifying the desired density profile and then solving an inverse problem in order to determine the necessary flow rates of light and dense fluid...

Design of primary settling tank has historically been done more empirically than rationally. The main reason for this is a lack of understanding of what pollutants primary settling tank are capable of removing. Inlets should be designed to dissipate the kinetic energy or velocity head of the mixed liquor. They should be able to distribute the flow equally in vertical and horizontal directions. ...

In order to increase the performance of a primary sedimentation tank (clarifier), it is essential to have a uniform and calm flow field. The use of suitable baffle configurations may help forming favorable flow field and increase the efficiency of the primary sedimentation tank. In order to find the proper position of a baffle in a rectangular primary sedimentation tank, computational investiga...