Matched open- and closed-channel DNS reveal that free-surface influence on turbulence is transported primarily through pressure and viscous terms with distinct near-surface scales and VLSM coupling.
Scaling of the Velocity Fluctuations in Turbulent Channels up to
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Eddy viscosity in wall turbulence varies with outer boundary conditions across configurations, and a parametric outer correction embedded in a Cess-van Driest framework improves mean-flow accuracy for open channels while matching classical results elsewhere.
Inner-scaled linear contribution to wall-pressure variance remains O(1) at high Reynolds numbers, based on collapse of measured factors and inverse decay of gradient variance in the inertial layer.
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How is the free surface influence transported in turbulent open channel flows?
Matched open- and closed-channel DNS reveal that free-surface influence on turbulence is transported primarily through pressure and viscous terms with distinct near-surface scales and VLSM coupling.
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Revisit eddy viscosity in pressure-driven wall turbulence at high Reynolds number
Eddy viscosity in wall turbulence varies with outer boundary conditions across configurations, and a parametric outer correction embedded in a Cess-van Driest framework improves mean-flow accuracy for open channels while matching classical results elsewhere.
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An Inner-Scaled Linear Contribution to Wall-Pressure Variance at High Reynolds Number
Inner-scaled linear contribution to wall-pressure variance remains O(1) at high Reynolds numbers, based on collapse of measured factors and inverse decay of gradient variance in the inertial layer.