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 8 of 8 for “"coherent motions"”.
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On the passive oscillations of a splitter plate in stratified turbulence
… conducted to understand the turbulence-induced motions of a rigid at plate able to rotate at its quarter span. Dominant coherent motions that varied along the vertical direction were imposed on the incoming flow using a variety of tapered cylinders. Emphasis is placed on the effect of cylinder …
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Characteristics of Coherent Structures in Marine Atmospheric Surface Layer
… the spatial and temporal characteristics of coherent structures in the near neutral marine atmospheric surface layer. With Taylor's hypothesis, the temporal velocity signals have been transformed to spatial fluctuations and then visualize these spatial velocity fluctuations to identify the …
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Some Features of Tip Gap Flow Fields of a Linear Compressor Cascade
… streaks inward toward the wall are the dominant coherent motions. The octant analysis for the three-dimensional turbulent boundary layer in the tip gap shows that the dominant octant events are partially different from those in the two-dimensional turbulent boundary layer, but ejection and sweep …
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Theory and simulations of confined active suspensions
… collective motion and large-scale spatiotemporal coherent patterns. The mechanisms behind the emergence of collective dynamics and self-organization from individual interactions has received increasing attention in the past few years, and could provide valuable insight into the behavior of …
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Turbulent Boundary Layer Superstructures Near the Wall and Their Relationship to Wall-Pressure Fluctuations
… are characterized as regions of organized coherent motions that are on the order of several boundary layer thickness long in the streamwise direction and meander in the spanwise direction as they move and evolve within the boundary layer. They are presumed to exist within the outer region …
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The dynamics of the outer region of wall-bounded turbulence : La dinámica de la zona exterior en la turbulencia de pared
… conclusions are drawn from the analysis of the coherent structures of vor ticity that populate the logarithmic and outer regions of the wall-disturbed cases. The attached clusters have the same properties over smooth and rough walls, and in both cases they make important contributions to the …
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The spectral characteristics of wind-farm power output
… by advection and turbulent diffusion of coherent motions. This correlation is most evident in the cross-spectra of power output between turbine pairs, which contributes to peaks and troughs in the power spectra of the combined signals. These peaks and troughs occur at frequencies …
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On the dynamics of rigid and flexible structures under complex flows
… turbulence levels. Results show that the motions of the splitters contained dominating modes, $f_p$ and $f_v$, which were induced by the mean flow and wake dynamics. High background turbulence dampened the coherence of the regular vortex shedding leading to negligible $f_v$. For a …