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 12 of 12 for “"transient growth"”.
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Statistical Stability and Fast Transient Growth in Wall-Bounded Turbulence
… models such as modal stability analysis and transient growth calculation. With a purpose to better the understanding of the relationship between the mean flow and the background turbulence structures, this thesis revisits the linear stability of the mean flow in statistical framework and …
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Mathematical Modeling and Dynamic Recovery of Power Systems
… of the LSEN can potentially exhibit interesting transient dynamics, we study the transient growth for the exponential matrix related to the LSEN. We follow Godunov's approach to get upper bounds for the transient growth and also analyze the relationship of such bounds with classical bounds based …
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Instability and Energy Growth in Stratified Shear Flows
… the breakdown is how sufficient energy growth is achieved, with both linear modal instability and transient growth as possible candidates. The introduction of stratification can affect the strength of the instabilities and transient growth by suppressing vertical motions, but it can also …
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Magnetic Stability Analysis for the Geodynamo
Kinematic dynamo modelling addresses the growth of magnetic fields under the action of fluid flow, effected in the geophysical case by the action of the convecting electrically conducting outer core and magnetic diffusion. In this study, we prescribe the flow to be stationary and geophysically …
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Generalised nonlinear stability of stratified shear flows: adjoint-based optimisation, Koopman modes, and reduced models
… flow. I begin by describing the history of transient growth phenomena, and in particular the recent application of adjoint based optimisation to find nonlinear optimal perturbations and associated minimal seeds for turbulence, the smallest amplitude perturbations that are able to trigger …
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Bioinspired alterations of collagen-glycosaminoglycan scaffolds for tissue regeneration applications
… cellular behavior towards regeneration in vivo. Growth factors play a significant role in the overall health, function and phenotypic fate of cells in vivo and in vitro. We used charged glycosaminoglycans (found naturally in the ECM) to electrostatically sequester growth factors within the …
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The development and stability of some non-planar boundary-layer flows.
… there exists the theoretical possibility of transient growth initiating a ‘bypass’ transition to turbulence. However, after accounting for the transient nature of the underlying flow itself, we hypothesize a significantly higher threshold Re[subscript]c ≈ 1000 for full breakdown of the …
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Nonlinear long-wave interfacial stability of two-layer gas-liquid flow
… conditions appears to play a role in the transient growth of undercompressive shocks, and may relate to the phenomena observed near the onset of flooding. We then perform a linear stability analysis when the gas phase is compressible. The base-state profile for the density is spatially …
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Accessory Nucleases Provide Robust Antiparasite Immunity for Type III CRISPR-Cas Systems
… host and invader transcripts. This induces a transient growth arrest in the host cell, which is relieved upon target clearance. This growth arrest "buys time" for the Cas10-Csm complex to eliminate the plasmid, which is required for clearance against weakly transcribed targets. Further, I …
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In situ electron microscopy of nanomaterials dynamics in heterogeneous phase environments
… cell TEM. Radiolysis leads to the nucleation and growth of metal nanocrystals by reacting with the radicals, and I used the model to address the temperature-dependent chemical environment and corresponding kinetics of nanocrystal growth. The results demonstrated that the combination of microscopy …
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On the application of numerical continuation to large-scale dynamical systems
… are governed by different time scales. The transient growth of aerosol particles in a humid environment is then investigated in order to explore the effect of some system parameters, such as the initial size distribution and the rate of temperature decay, on the formation of cloud droplets. …
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Enhancement of Nucleate Boiling on Rough and Dimpled Surfaces with Application to Composite Spreaders for Microprocessors Immersion Cooling
… density over the past two decades, owing to the growth in complexity, performance, and parallelism of computational systems. To continue to effectively and safely dissipate larger amounts of power, advanced methods of cooling such as immersion cooling by nucleate boiling of dielectric liquids are …