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- W1996863227 abstract "The Lagrangian second-moment method is used to compute the dye-concentration distribution in turbulent recirculating flow generated in a shallow open channel by a sudden widening of flow in the transverse direction. The performance of the second-moment method is compared with the Eulerian numerical schemes of Upwind, QUICK, HLPA, and the semi-Lagrangian Hermite scheme. The results show that the Lagrangian second-moment method is an accurate and a very promising scheme for the computation of concentration distribution in flows dominated by advection. It minimizes the generation of numerical diffusion, is free from numerical oscillations, and is independent of the value of Courant number. Its efficiency in terms of computational time is high in flows where the mixing is confined to a small region of the solution domain and low in flows where the mixing is extended in the whole solution domain. In addition to an accurate numerical scheme, a necessary requirement for the accurate prediction of concentration field is a hydrodynamic model able to determine correctly the velocity field and the diffusion coefficient in shallow recirculating flows." @default.
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- W1996863227 date "1997-09-01" @default.
- W1996863227 modified "2023-10-17" @default.
- W1996863227 title "Computation of Dye Concentration in Shallow Recirculating Flow" @default.
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- W1996863227 doi "https://doi.org/10.1061/(asce)0733-9429(1997)123:9(793)" @default.
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