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Direct Numerical Simulations of turbulent channel flow roughened with 2D triangular bars: On the Effective Distribution parametrization
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DOI：10.1016/j.ijheatfluidflow.2025.110015.png)
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Abstract
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• A new geometrical parameter of the roughness, the Effective Distribution, is defined. • Direct numerical simulation of turbulent flow in a channel 2D roughness. • The ED improved drag correlation by accounting for peaks above mean Roughness. • The ED improved drag correlation by accounting for wake regions from the highest elements. • The ED improved drag correlation by accounting for distances between elements.
Keywords:
Roughness
Effective slope
DNS
Effective distribution
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