Search for dissertations about: "travelling waves"

Showing result 1 - 5 of 22 swedish dissertations containing the words travelling waves.

  2. 1. On steady waves in two-layer fluids and ferrofluids

    Author : Dag Nilsson; Partiella differentialekvationer; []
    Keywords : Internal waves; ferrofluids; partial differential equation; nonlinear waves; travelling waves; solitary waves; dynamical systems; Hamiltonian systems; non-local equations;

    Abstract : This thesis concerns travelling waves in a two-layer fluid and on a ferrofluid jet. We prove existence of several types of such waves by reformulating the corresponding governing equation as an infinite dimensional dynamical system, where an unbounded spatial coordinate is used as time. READ MORE

  4. 2. On Steady Water Waves and Their Properties

    Author : Mats Ehrnström; Matematik (naturvetenskapliga fakulteten); []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Particle trajectories; Water waves; Vorticity; Maximum principles; Elliptic equations;

    Abstract : Abstract: This thesis consists of four papers related to various aspects of steady water waves. Paper I: Deep-water waves with vorticity: symmetry and rotational behaviour. We show that for steady, periodic, and rotational gravity deep-water waves, a monotone surface profile between troughs and crests implies symmetry. READ MORE

  5. 3. Laser-Driven Plasma Waves for Particle Acceleration and X-ray Production

    Author : Guillaume Genoud; Atomfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Laser plasma acceleration of electrons and protons; laser-wakefield acceleration; plasma waves; plasma-wiggler radiation; betatron radiation; laser guiding; laser pointing stabilisation;

    Abstract : This thesis presents experimental results related to laser plasma accelerators. These rely on very different principles from conventional particle accelerators. READ MORE

  6. 4. Impact of Rossby waves on ozone distribution and dynamics of the stratosphere and troposphere

    Author : Grigory Nikulin; Sheila Kirkwood; Ulrike Langematz; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Meteorology; ozone; wave activity; trends; Brewer-Dobson circulation; Rossby waves; Arctic Oscillation; low ozone events; Meteorologi; Meteorology; Meteorologi; Meteorology; meteorologi;

    Abstract : Several physical mechanisms concerning the impact of Rossby waves on ozone distribution and circulation in the stratosphere and troposphere are studied in the thesis.Summertime total ozone variability over Middle Asia and Northern Scandinavia shows similar wave-like behaviour with typical periods of 10-20 days and amplitudes of 20-50 Dobson units. READ MORE

  7. 5. Strong blast wave interaction with multiphase media

    Author : Sembian Sundarapandian; Nicholas Apazidis; Konstantinos Kontis; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Blast waves; negative pressure; cavitation; blast wave attenuation; RMI; KHI; Teknisk mekanik; Engineering Mechanics;

    Abstract : The interaction of a blast wave propagating in air with different fluids like water column, aqueous foam and thermal/density inhomogeneity have been studied both experimentally and numerically. The blast waves were generated at atmospheric conditions in a newly constructed exploding wire facility. READ MORE