Search for dissertations about: "Wave propagation"

Showing result 1 - 5 of 257 swedish dissertations containing the words Wave propagation.

  1. 1. Atmosphere-ocean Interactions in Swell Dominated Wave Fields

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Alvaro Semedo; Uppsala universitet.; [2010]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Waves; Wind sea; Swell; Swell propagation; MABL; Air-sea interaction; Momentum flux; Wave climate; Coupling; Wave age; Empirical Orthogonal functions; Wave model; Climate model; WAM; RCA; wave heights; NATURAL SCIENCES Earth sciences Atmosphere and hydrosphere sciences Meteorology; NATURVETENSKAP Geovetenskap Atmosfärs- och hydrosfärsvetenskap Meteorologi; Meteorologi; Meteorology;

    Abstract : Ocean wind waves represent the atmosphere-ocean boundary, playing a central role in the air-sea exchanging processes. Heat, mass and momentum are transferred across this boundary, with waves mediating the exchange of principally the momentum between the winds and the ocean surface. During the generation process waves are called wind sea. READ MORE

  2. 2. Numerical Methods for Wave Propagation Analysis and Applications in Quantum Dynamics

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Emil Kieri; Uppsala universitet.; Uppsala universitet.; [2016]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; computational wave propagation; quantum dynamics; time-dependent Schrödinger equation; spectral methods; Gaussian beams; splitting methods; low-rank approximation; Scientific Computing; Beräkningsvetenskap;

    Abstract : We study numerical methods for time-dependent partial differential equations describing wave propagation, primarily applied to problems in quantum dynamics governed by the time-dependent Schrödinger equation (TDSE). We consider both methods for spatial approximation and for time stepping. READ MORE

  3. 3. A Wave Expansion Method for Aeroacoustic Propagation

    University dissertation from KTH Royal Institute of Technology

    Author : Johan Hammar; KTH.; [2016]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Sound propagation; Sound generation; Aeroacoustics; Aerodynamics; Computational fluid dynamics; Computational aeroacoustics; Numerical methods; Lighthill; Curle; Ffowcs Williams and Hawkings; Frequency-domain propagation; Wave expansion method.; Farkostteknik; Vehicle and Maritime Engineering;

    Abstract : Although it is possible to directly solve an entire flow-acoustics problem in one computation, this approach remains prohibitively large in terms of the computational resource required for most practical applications. Aeroacoustic problems are therefore usually split into two parts; one consisting of the source computation and one of the source propagation. READ MORE

  4. 4. Wave propagation in sandwich structure

    University dissertation from Institutionen för farkostteknik

    Author : Shiva Sander Tavallaey; KTH.; [2001]
    Keywords : Sandwich structure- wave propagation- dynamic behavior;

    Abstract : .... READ MORE

  5. 5. Shape Optimization for Acoustic Wave Propagation Problems

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Rajitha Udawalpola; Uppsala universitet.; Uppsala universitet.; [2010]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; shape optimization; design optimization; acoustic wave propagation; Helmholtz equation; Boundary Element Method; Finite Element Method; inverse problems; adjoint method; gradient-based optimization; Scientific Computing; Beräkningsvetenskap;

    Abstract : Boundary shape optimization is a technique to search for an optimal shape by modifying the boundary of a device with a pre-specified topology. We consider boundary shape optimization of acoustic horns in loudspeakers and brass wind instruments. READ MORE