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 “"hard-wall"”.
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A Study of Aerodynamics in Kevlar-Wall Test Sections
… characterize the aerodynamic behavior of Kevlar-wall test sections and specifically those containing two-dimensional, lifting models. The performance of the Kevlar-wall test section can be evaluated against the standard of the hard-wall test section, which in the case of the Stability Wind Tunnel …
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Wetting Phenomena Near the Melting Curve
A study of the location of the hard sphere crystal-fluid phase transition and equilibrium wetting states for systems in contact with various hard substrates was undertaken using Monte Carlo (MC) and molecular dynamics (MD) techniques. Through the use of MD the phase transition was found to occur at …
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A Multifaceted Phenomenon of Hydrophobic Effects: Insights Learned from Nucleation Algorithm Based Computer Simulation Approach
… confined spaces between two infinitely parallel walls have been studied. Our simulation results demonstrate that the weak attractive interaction between water molecules and walls allows water molecules to pack more efficiently for the smallest wall separation of 3 Å considered here comparing with …
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Dynamics of polymer melts confined between adsorbing surfaces spaced at molecular dimensions
… the strong repulsive short range surface forces (hard-wall $\sim$2.8 R$\sb{\rm G}).$ The static surface forces and dynamic regimes scale with the size of the polymer molecules. This reflects the universal ranges of polymer melts perturbed by the adsorbing surfaces.
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Investigation of the Herschel-Quincke tube concept in a rectangular lined duct
… were tested: liner only, HQ tube with a hard wall duct, and HQ tubes with liners. Analytical predictions were shown to correlate well with the experimental data. Two typical types of liners, perforate and linear, were tested in these investigations. The perforate and linear liners with HQ …
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The Dynamics of Single and Double Cavitation Bubbles and Interaction Between Bubbles and Different Materials
… identified. For bubble collapsing near a rigid wall, when standoff ratio γ < 0.6, the ring collapse is the most prominent pressure source. The jet takes the strongest effects at γ = 1.12. The pressure is minimal at γ = 0.913. After the first jet impingement, a second ring collapse will follow …
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Low-dimensional electron systems fabricated with an atomic force microscope
… For optimum operation, this device requires a hard-wall potential profile, which is a benefit of the AFM local anodic oxidation technique. The AFM oxidation technique is also used to pattern wafers of GaAs which are later cleaned and regrown in a molecular beam epitaxy system. GaAs and InAs are …
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The acoustics of curved and lined cylindrical ducts with mean flow
… The scattering of sound by a sudden hard-wall to thin-shell boundary change is considered, using the Wiener–Hopf technique. The causal acoustic field is derived analytically, without the need to apply a Kutta-like condition or to include an instability wave, as had previously been …
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Force microscopy of self-assembled amphiphilic films
… to determine the relative importance of simple hard-wall confinement versus the influence of the underlying substrate lattice. Lateral (friction) forces have also proven to be a useful contrast mechanism in imaging surfaces. The results presented here demonstrate the use of lateral force …
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Structure and thermodynamics of solid/fluid interfaces: simulation and theory
… results from Monte Carlo simulation of the hard-disk fluid at hard walls of various shapes are presented. The effect of surface curvature on the interfacial free energy, , and the interfacial excess volume, vex, are studied in detail using simulation and virial expansions in the low density …
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Coupled one dimensional electron systems and stripe phases of high temperature superconductors
… states and Mott insulators in the presence of a hard-wall boundary. I calculate the boundary contribution to the single-particle Green function in the low-energy limit using field theory techniques and analyze it in terms of its Fourier transform in both time and space. The boundary LDOS in the …
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Ordering of Nanoparticles by Wrinkle-Assisted Self-Assembly : Controlling Plasmonic Coupling Effects
… was stimulated by an American physicist, Richard Feynman, in his famous “There’s plenty of room at the bottom” address, and the term nanotechnology first appeared in 1974 from the Japanese Norio Tanigucho. Since these pioneering works, thousands of publications have been focused on the …