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To improve the understanding of how static mixers work and how to better utilize them in environmental engineering ͑or, specifically, drinking water treatment͒, a numerical model for simulating turbulent flows in helical static mixers is developed. The model solves the three-dimensional, Reynolds-averaged Navier-Stokes equations, closed with the k-turbulence model, using a second-orderaccurate finite-volume numerical method. Numerical simulations are carried out for a two-element helical staticdoi:10.1061/(asce)0733-9372(2002)128:5(431) fatcat:bmj3tsyccbhsbe74hwtngbwv7m