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Large-eddy simulation of dispersion from line sources in a turbulent channel flow. (English) Zbl 1427.76092
Summary: Large-eddy simulations of the dispersion from scalar line sources at various locations within a fully developed turbulent channel flow at \(Re = uh/\nu = 10\),400 are presented. Both mean and fluctuating scalar quantities are compared with those from the single available set of experimental data [R. A. Lavertu and L. Mydlarski, J. Fluid Mech. 528, 135–172 (2005; Zbl 1165.76302)] and differences are highlighted and discussed. The results are also discussed in the context of scalar dispersion in other kinds of turbulent flows, e.g. homogeneous shear-flow. Initial computations at a much lower Reynolds number are also reported and compared with the two available direct numerical simulation data sets.

76F65 Direct numerical and large eddy simulation of turbulence
76F10 Shear flows and turbulence
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