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 4 of 4 for “"transitionally rough"”.
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Near-wall turbulence in the transitionally rough regime
… of this thesis is to investigate and model how roughness increases drag in turbulent flows. This work focuses on the transitionally rough regime, where roughness is large enough to have an impact on drag but the rough regime is not fully developed. By restricting ourselves to this regime, we can …
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Effects of surface roughness on the flow characteristics in a turbulent boundary layer
… the dynamics of turbulent boundary layers over rough surfaces is much less well known. Nevertheless, there are many industrial and environmental flow applications that require understanding of the mean velocity and turbulence in the immediate vicinity of the roughness elements. This thesis …
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Velocity distribution prediction in rectangular and compound channels under smooth and rough flow conditions
… under different flow regimes, in terms of roughness and turbulence conditions, were investigated experimentally and numerically. The detailed results from the experiments and numerical simulations were then used to assess and improve two velocity distribution models, which are widely used …
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Geometry-Aware Modeling of Rough-Wall Turbulence Using Reynolds-Averaged Navier-Stokes (RANS) Frameworks
Turbulent flow over rough walls is widespread in engineering systems and plays a critical role in drag prediction, energy efficiency, and transport processes in internal and external flows. Despite extensive research, the representation of roughness effects in Reynolds-Averaged Navier–Stokes (RANS) …