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http://dx.doi.org/10.3795/KSME-B.2015.39.7.617

A Comparative Study of Turbulence Models for Dissolved Air Flotation Flow Analysis  

Park, Min A (School of Mechanical and Aerospace Engineering, Sejong Univ.)
Lee, Kyun Ho (School of Mechanical and Aerospace Engineering, Sejong Univ.)
Chung, Jae Dong (School of Mechanical and Aerospace Engineering, Sejong Univ.)
Seo, Seung Ho (Tops Engineering Co, Ltd.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.39, no.7, 2015 , pp. 617-624 More about this Journal
Abstract
The dissolved air flotation (DAF) system is a water treatment process that removes contaminants by attaching micro bubbles to them, causing them to float to the water surface. In the present study, two-phase flow of air-water mixture is simulated to investigate changes in the internal flow analysis of DAF systems caused by using different turbulence models. Internal micro bubble distribution, velocity, and computation time are compared between several turbulence models for a given DAF geometry and condition. As a result, it is observed that the standard ${\kappa}-{\varepsilon}$ model, which has been frequently used in previous research, predicts somewhat different behavior than other turbulence models.
Keywords
Dissolved Air Flotation; 2-Phase Flow; Turbulence Model; Computational Fluid Dynamics;
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