Tsuchida, TylerIrvine, Joshua LelemiaSiufung TangaLumb, LeightonKima, Albert S.Nishikawab, Jamie2023-02-062023-02-062018-03Tyler Tsuchida, Joshua Lelemia Irvine, Siufung Tang, Jamie Nishikawa, Leighton Lum, Albert S. Kim, Sewer Chamber Design under Critical Conditions using Computational Fluid Dynamics (CFD), <em>Desalination and Water Treatment</em>, 108 (2018) 1–14, https://doi.org/10.5004/dwt.2018.22019.http://hdl.handle.net/10790/7327Transient sewage flow patterns inside a utility chamber are studied using open source computational fluid dynamics software, OpenFOAM. The solver used is based on Reynolds-averaged Navier–Stokes equations with κ – ∈ turbulence model. We found that there are two distinct flow regimes based on the inflow rate. For a low inflow rate, the sewage level does not exceed the outlet pipe, and a steady state is reached within a minute. For a high inflow rate, the tantalizing phenomenon is observed such that the sewage level periodically moves up and down passing the top of the outlet pipe. In this case, a steady state is intrinsically absent, and the sewage level continuously fluctuates for a long time. A chamber overflow occurs with a small outlet diameter and a fast inflow rate. Using Scotch algorithm parallel computation of an OpenFOAM solver, interFoam, has been efficiently conducted within a reasonable amount of time.1 pageen-USAttribution-NonCommercial-NoDerivs 3.0 United StatesComputational fluid dynamicsOpenFOAMSewer designManhole flowUrban runoffAbstract10.5004/dwt.2018.22019