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 26 for “"collision dynamics"”.
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Simulation of ship-ice collision dynamics.
… the threat to survivability presented by head-on collision with multi-year ice or fragments of icebergs. The task of developing effective numerical models for studying the collision process has been hampered by the complexity of the physical interaction mechanisms. The present research considers …
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Studies in Molecular Collision Dynamics: Tunneling in Chemical Reactions and Vibrational Energy Transfer in Hydrogen-Fluoride Systems
Made available in DSpace on 2014-12-13T20:10:47Z (GMT). No. of bitstreams: 1 8009006.pdf: 3987233 bytes, checksum: e11d66b452a643d2fbf4e5d5296cdd7e (MD5) Previous issue date: 1979
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Electron capture and ionization dynamics in ion-Rydberg collisions
… mechanics can be used to help determine the collision dynamics of simple ion-atom collision systems. It was once thought that all particle collisions must be calculated via quantum mechanics in order to obtain meaningful results. The problem with quantum mechanical calculations is that each …
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Computational modelling of ice floe dynamics in the Antarctic marginal ice zone.
… small and mobile ice floes, governed by collisional dynamics and fracture mechanics, requires detailed finer-scale sea ice dynamics models. Therefore, this project focuses on small-scale modelling of sea ice dynamics in the Antarctic MIZ. A more detailed model implies a heterogeneous sea …
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Electron-impact ionization of molecules
… incident-electron energy ( ̃thousand eV), the collision dynamics has been well described by the plane wave impulse approximation (PWIA) for most molecules. For intermediate and low incident-electron energy ( ̃hundreds-tens eV) collisions, currently there has been no reliable theoretical …
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Understanding bulk behavior of particulate materials from particle scale simulations
… models are developed to simulate the particle dynamics inside a conical screen mill (comil) and magnetically assisted impaction mixer (MAIM), both are important particle processing devices. For comil, the mean residence time (MRT), spatial distribution of particles, along with the collision …
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Collision study for the one-way IVDS channel
A collision study is performed to compare the interference rejection characteristics of two spread spectrum receivers, one employing a sliding correlator and the other using a more sophisticated matched filter design. The testing involves using two similar transmitters, one acting a the jammer, to …
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WDM of solitons in dispersion managed transmission systems
… with real systems are outlined. Problems due to collision induced frequency shifts are calculated using numerical simulation, and these results compared with analytical techniques where possible. Different two-step dispersion regimes, as well as the special cases of uniform and exponentially …
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Simulating Nanoparticle and Polymer Dynamics in Solution
The dynamics of nanoparticles in complex fluids are of great interest for applications in drug delivery, oil recovery, and materials processing. Particle mobility is well described by the generalized Stokes-Einstein (GSE) relation when the nanoparticles are much larger than the polymers. Violations …
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Turbulence-particle interactions on surfaces
… of individual particle detachment, it is a collision dynamics leading to cluster formation that dominates the pattern of detachment of particles from surfaces. We find that collisions lead to aggregations of particles on the surface in the form of clusters of self-similar sizes. We find that …
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Multi-GPU Accelerated High-Fidelity Simulations of Beam-Beam Effects in Particle Colliders
… or LHeC. These simulations model the non-linear collision dynamics of two counter rotating beams in particle colliders for millions of turns. In particular, at each turn, the algorithm simulates the collision of two directed beams propagating at different speeds with different number of bunches …
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Dynamics and assembly of colloidal particles
In this dissertation, I present research into the dynamics and assembly of colloidal particles. This involves investigations into single particle dynamics, collective dynamics of assembled clusters, and thermodynamic studies of colloidal superstructure formation. To do this, I have utilized a …
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Exploring Matter-wave Dynamics with a Bose-Einstein Condensate
… in the non-asymptotic regime, for which the collision dynamics are on-going. Using a Bose-Einstein condensate interacting with a sharp repulsive potential, two distinct transient scattering effects are observed: one due to the momentary deceleration of particles atop the barrier, and one due …
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Thermophoresis in Colloidal Suspensions
… using the theory of non-equilibrium thermodynamics. The colloidal flux is split up into an interfacial single-colloid contribution and a bulk contribution, followed by a determination of transport coefficients based on Onsager’s reciprocal relations. It is further shown how the …
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Surrogate-based optimization of a BioMEMs microfluidic weir
… rigid body physics library to handle rigid body collision dynamics between the cell and the weir. This model was used to address two research questions which are the two main discussions of the thesis. The first discussion studies in detail the mechanisms behind the 'Around The Side' (ATS) and …
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Elongated microswimmers: influence of hydrodynamics
… swimming mechanisms. Consequently, their dynamics arises from the interplay of different interactions, i.e., direct collisions and long-range flow fields. It is subject of current research to determine the role of the different interactions for the fascinating collective dynamics. In this …
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Modeling mechanical dynamics in chain-mediated bacterial sliding
Investigating the mechanical dynamics of bacterial motility has led to a deeper understanding of the behaviors and lifecycle of many bacterial species. We discuss chain driven sliding motility where the bacteria maintain connections between daughter cells following division, resulting in long …
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Fundamentals of the Simplex Communication Channel With Retransmissions
… is successfully received. The actual message collision dynamics in this system are experimentally studied using two different types of direct-sequence spread spectrum receivers, one employing a sliding correlator and the other using a matched filter. The spreading code in such systems offers …
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A Small-Scale Model of Sea Ice Dynamics in the Antarctic Marginal Ice Zone Using Fluid-Structure Interaction and the Reference Map Technique
… prevent sea ice consolidation. The sea ice dynamics of this region influences the global climate and therefore research in this area is important to understand global climate and predict long-term change. Adequate research on the region has been challenging due to its complex nature. …
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