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Design criterion for hydrodynamic vortex separator

Gronowska-Szneler M.A., Sawicki J. M.

Transactions of the Institute of Fluid-Flow Machinery

2017

nr 135

3--9

The process of designing technical objects involves determination of geometrical parameters that characterize a given device. When device operation is described by diﬀerential equations, an inverse problem brings diﬃculties, as geometrical values being sought condition the solution to the problem. Vortex separators, used for removal of suspension from storm wastewater are usually designed by the ‘criterion method’. Firstly, a critical particle is distinguished such that bigger particles are removed from wastewater stream, whereas smaller particles stay in the stream. Next, by comparing values of major forces acting on the critical particle at the most unfavourable point within the separator (usually at outﬂow cross-section), a force balance is made. The resulting algebraic relation becomes the design criterion.