Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"logarithmic velocity profile"”.
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The relationship between microscales and wind-wave spectral development
… between parameters of the predominantly logarithmic velocity profile.
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Impacts of channel curvature on drag, mixing, and stratification in estuaries
… and bottom stress are enhanced compared with a logarithmic velocity profile. The form drag due to flow separation and enhanced bed stress due to secondary circulation combine to increase the drag in the North River by a factor of 2-5 compared to the expected values. In addition to increasing the …
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Impacts of Channel Curvature on Drag, Mixing, and Stratification in Estuaries
… and bottom stress are enhanced compared with a logarithmic velocity profile. The form drag due to flow separation and enhanced bed stress due to secondary circulation combine to increase the drag in the North River by a factor of 2-5 compared to the expected values. In addition to increasing the …
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Large eddy simulation of the upper atmospheric surface layer
… involves 64 x 64 x 50 grids. The average of the velocity fields over the whole horizontal plane and time domain yields a logarithmic velocity profile in the USL, from which the von Kãrman constant can be derived. The value of IC found in the study ranges from 0.17 to 0.35, depending on the value …
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Dissipationsintegralverfahren für turbulente Grenzschichten
… werden aus expliziten Geschwindigkeitsprofilen hergeleitet. Hierzu werden beruhend auf dem Zweischichtenmodell turbulenter Grenzschichten Geschwindigkeitsprofile turbulenter Grenzschichten diskutiert. Drei Kombinationen von Haupt- und Querströmungsprofil werden für den dreidimensionalen …
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Geometry-Aware Modeling of Rough-Wall Turbulence Using Reynolds-Averaged Navier-Stokes (RANS) Frameworks
… roughness height and empirical shifts of the logarithmic velocity profile, which can reproduce bulk quantities for specific surface classes. The mechanisms by which surface geometry alters near-wall momentum transfer are often absorbed implicitly into modified boundary conditions (BCs) or an …
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Characterizing flow resistance in high gradient mountain streams, Fraser Experimental Forest, Colorado
… discharges, because methods assuming a semi-logarithmic velocity profile become invalid at base flows. A new method of calculating grain resistance is suggested for lower flows, by dividing the characteristic grain size between those elements that protrude above the water surface (D90) and …