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Showing 1 to 5 of 5 for “"passive scalars"”.
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Regeneration mechanisms of organized structures in near-wall turbulence
… flow is not necessary for streak formation. Passive scalars having different mean scalar profiles were introduced in forced quasi-2D and 3D turbulent flows in order to compare the streak spacing of the scalars deduced from two-point correlations of DNS results with results obtained …
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Numerical Simulation of Unsteady Flows of Physiological Relevance
… On the other hand, blood components (modeled as passive scalars with different values of Schmidt numbers) do exhibit upstream effects over a longer range.An important finding is that Schmidt number effects may lead to redistribution of the different scalars. The variations in the concentrations …
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Quantifying exchange processes in the urban canopy layers of dense neighborhoods
… using CFD for each case. Next, simulated passive scalars are released into each neighborhood from a near-ground volumetric source, and the average steady state non-dimensional concentrations are calculated in the UCL and at pedestrian height. Using these concentrations as metrics, the …
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A Bayesian Approach to Estimating Background Flows from a Passive Scalar
… from the partial and noisy observation of a passive scalar (e.g., the concentration of a pollutant). Here the unknown is a vector field that is specified by large or infinite number of degrees of freedom. We show that the inverse problem is ill-posed, i.e., there may be many or no background …
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Subgrid Scale Modeling for Large Eddy Simulation of Buoyant Turbulent Flows
<p>Buoyancy effects due to small density differences commonly exist in turbulent fluid flows occurring in nature and in engineering applications. The large eddy simulation (LES) technique, which is being increasingly used for simulating buoyant turbulent flows, requires accurate modeling of the …