This paper reports on results from steady-state Reynolds-averaged Navier-Stokes simulation (RANSS) of the flow and passive nonreactive tracer transport inside a multichambered, laboratory-scale ozone contactor using a structured, collocated, finite-volume discretization. Simulations are posed following a physical laboratory experiment. Simulations performed on different grids lead to varying degrees of short-circuiting and dispersion, which ultimately leads to differences in the residence time distribution (RTD) of the tracer (released at the inflow as a pulse) and in particular index. The predicted index depends on grid density and RANS turbulence model. For fine grids that resolve the viscous sublayer, a model with proper behavior within this sublayer has to be applied for accurate prediction of . Simulations on all considered grids with proper turbulence model yield cumulative RTD and associated index in good agreement with the experimental data despite the underresolution of the flow by the RANSS methodology relative to a large-eddy simulation (LES) of the same flow. [ABSTRACT FROM AUTHOR]
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