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 20 of 50 for “"hydrodynamic simulations"”.
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Meshless hydrodynamic simulations of young supernova remnants
… circumstellar environments to investigate the hydrodynamic evolution of young supernova remnants in the SedovTaylor phase. We used the massively parallel, multi-physics magneto-hydrodynamics (MHD) and gravity code, GIZMO, for our simulations. We chose GIZMO for its flexibility in allowing the …
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Large Scale Hydrodynamic Simulations of Emulsions and Foams
This work complements previous studies by Metsi and by Zinchenko and Davis. In extending the work of Metsi, this study considers non-unit viscosity ratio for large scale monodisperse systems, higher dispersed phase volume fractions, and tighter simulation error tolerance. Zinchenko and Davis …
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Cosmological hydrodynamic simulations of the Lyman-alpha forest
… three dimensional, multi-species, cosmological hydrodynamic simulations of the formation and evolution of Ly$\alpha$ forest absorbers were performed in three CDM-like cosmological models: the standard CDM model (SCDM), the flat CDM model with a nonzero cosmological constant ($\Lambda$CDM) and …
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Hydrodynamic Simulations of Colloidal Gels: Microstructure, Dynamics, and Rheology
… predictions and a new algorithm for dynamic simulations. A focus is made on those combinations of attraction and repulsion that lead to the formation of gels. The effects of varying the strength of attraction (0–50kT), range of attraction (0.05–0.18a), strength of repulsion (0–54kT), and …
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Advancing additive friction stir deposition as a repair technology through smooth particle hydrodynamic simulations.
Additive Friction Stir Deposition (AFSD) is a solid-state additive manufacturing (AM) process capable of generating near net shape components though layer by layer depositions. AFSD leverages frictional and plastic heat generation to plasticize material inside of a hollow, rotating tool. In …
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Coupling Computationally Expensive Radiative Hydrodynamic Simulations with Machine Learning for Graded Inner Shell Design Optimization in Double Shell Capsules
… experiments rely heavily on predictive physics simulations in the design process. Specifically in inertial confinement fusion (ICF), predictive physics simulations, such as in the radiation-hydrodynamics code xRAGE, are computationally expensive, limiting the design process and ability to find …
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Global simulations of heat-flux-driven buoyancy and magnetothermal instabilities, and their astrophysical implications
… (HBI) in two- and three- dimensional, global hydrodynamic simulations performed by the AREPO code, and verify the results of previous works. Our results have important astrophysical implications, such as the conductive heat transport in galaxy clusters.
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The Influence of Dark and Ordinary Matter Physics on Galaxy Formation
… assumption. This thesis details the use of hydrodynamic simulations, analytic and numerical methods, and observations to examine the fundamental nature of DM by asking how altering its microscopic properties can influence the largest scales, with an emphasis on galaxy formation. In …
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Dynamical instabilities in disc-planet interactions
… on the migration of a Saturnmass planet using hydrodynamic simulations. I explain the resulting nonmonotonic behaviour in the framework of type III planetary migration. I then examine the role of disc self-gravity on the vortex instabilities. It can be shown that self-gravity has a stabilising …
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Entwicklung eines Langfristgewässergütemodells für flache Standgewässer
… with the water column are closely coupled to hydrodynamics. After comprehensive literature study, the objective of this thesis is the development of a water quality model which specifically addresses characteristic features of shallow lakes and reservoirs with a potential for long-term water …
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Studies of non-hydrodynamic processes in ICF implosions on OMEGA and the National Ignition Facility
… fuel from the evolution predicted by main-line hydrodynamic simulations. Kinetic plasma dynamics relevant to ICF implosions have been studied experimentally using strongly-shocked ICF implosions containing multiple ion species, and diagnosed using both new and established nuclear diagnostics and …
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Stellar iron core collapse in {3+1} general relativity and the gravitational wave signature of core-collapse supernovae
… collapse supernovae. I supplement my {3+1} GR hydrodynamic simulations with 2D Newtonian neutrino radiation-hydrodynamic supernova calculations focussing on (1) the late postbounce gravitational wave emission owing to convective overturn, anisotropic neutrino emission and protoneutron star …
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The migration of giant planets in massive protoplanetary discs
… giant planets in unstable discs using radiative hydrodynamic simulations. More specifically we examine the migration of planets within different mass discs and at different orbital radii. We find that planets initially migrate inwards quickly. They are able to open up a gap and the migration …
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Self-Consistent Conversion of a Viscous Fluid to Particles and Heavy-Ion Applications
… early stages of a heavy-ion collision is viscous hydrodynamics. Comparing hydrodynamic simulations to heavy-ion data inevitably requires the conversion of the fluid to particles. This conversion, typically done in the Cooper-Frye formalism, is ambiguous for viscous fluids. In this thesis work, …
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Anisotropic Flow Measurement in Ultra-Central Pb-Pb Collisions For Run 10 and Run 11 by ALICE
… collision centrality range. Various hydrodynamic simulations show that $v_n$ correlates almost linearly with the initial eccentricity $\varepsilon_n$ of the system (which fluctuates on an event by event basis). This indicates that the measurement of $v_n$ fluctuations are extremely …
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Flux corrected transport applied to hydrodynamics for heavy ion collisions
… FCTHydro, a ROOT package, and its application to hydrodynamic simulations through the packages RelHydro and Nonideal xy. These packages aim to provide the broader heavy ion collision community with access to hydrodynamic simulation software which is now accessible from within the primary analysis …
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Boosting (in)direct detection of dark matter
… I study three aspects of dark matter; I use hydrodynamic simulations to extract properties of weakly interacting dark matter that are relevant for both direct and indirect detection signals, and construct viable dark matter models with interesting experimental signatures. First, I analyze the …
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Simulating the dynamical evolution of galaxies in group and cluster environments
… elusive. In this dissertation, I use numerical simulations of cluster mergers as well as galaxies evolving in quiescent environments to develop a theoretical framework to understand some of the physics of galaxy transformation in cluster environments. Galaxies can be transformed in smaller …
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The Legacy of the First Galaxies: Exploring Ancient Stars in the Milky Way
… expanding on these studies with highly-resolved hydrodynamic simulations of the earliest dwarf galaxies, the Aeos simulations. The methodology and initial results for these simulations are also presented.
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Analysis and Modelling of a Type II White-light Solar Flare
… and allow a deeper investigation using radiative hydrodynamic modelling.<br/> <br/> Radiative hydrodynamic simulations show that the observed flare signatures cannot be<br/>explained with ‘standard’ electron beams, since such beams deposit at least part of their energy in the upper chromosphere …
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