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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.

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