Please use this identifier to cite or link to this item: http://hdl.handle.net/10216/106525
Author(s): Anna M Karpinska
Madalena M Dias
Rui Boaventura
Ricardo J. Santos
Title: Modeling of the hydrodynamics and energy expenditure of oxidation ditch aerated with hydrojets using CFD codes
Issue Date: 2015
Abstract: This work uses computational fluid dynamics (CFD) as a design tool in wastewater treatment modeling practice to assess the specific use of the hydrojets in oxidation ditches. The hydrodynamics and the residence time distribution in an oxidation ditch are simulated using several turbulence models: Reynolds averaged Navier-Stokes simulations (RANS) and unsteady RANS with the standard k - epsilon model; and large eddy simulation with the Smagorinsky subgrid scale model. The influence of the mesh resolution, of the hydrojets placement on the oxidation ditch hydrodynamics and on the energy demand for mixing is assessed. Finally, the effect of the turbulence models on the macromixing data, which can be implemented in the activated sludge model, is also evaluated.
Subject: Ciências da terra e ciências do ambiente
Earth and related Environmental sciences
URI: http://hdl.handle.net/10216/106525
Related Information: info:eu-repo/grantAgreement/FCT - Fundação para a Ciência e Tecnologia/Projetos Estratégicos/PEst-C/EQB/LA0020/2013/PROJECTO ESTRATÉGICO - LA 20 - 2013-2014/LA 20
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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