Search for dissertations about: "fully non-linear"

Showing result 1 - 5 of 56 swedish dissertations containing the words fully non-linear.

  2. 1. Non-linear Free Boundary Problems

    Author : Andreas Minne; Henrik Shahgholian; Herbert Koch; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; free boundary; elliptic; fully non-linear; Mathematics; Matematik;

    Abstract : This thesis consists of an introduction and four research papers related to free boundary problems and systems of fully non-linear elliptic equations.Paper A and Paper B prove optimal regularity of solutions to general elliptic and parabolic free boundary problems, where the operators are fully non-linear and convex. READ MORE

  4. 2. Development of New Monte Carlo Methods in Reactor Physics : Criticality, Non-Linear Steady-State and Burnup Problems

    Author : Jan Dufek; Jan Wallenius; Waclaw Gudowski; Cheikh Diop; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Monte Carlo; reactor physics; fission source; inactive cycles; convergence; burnup; steady-state; criticality; eigenvalue; Nuclear physics; Kärnfysik;

    Abstract : The Monte Carlo method is, practically, the only approach capable of giving detail insight into complex neutron transport problems. In reactor physics, the method has been used mainly for determining the keff in criticality calculations. READ MORE

  5. 3. Numerical solutions to non-linear inhomogeneous problems in Superconductivity : From sphalerons to multi-band boundary states and spontaneous magnetic fields

    Author : Andrea Ludovico Benfenati; Egor Babaev; Sedrakyan Tigran; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Teoretisk fysik; Theoretical Physics;

    Abstract : This thesis is a compilation of theoretical works focused on simulating and studying open questions regarding single and multiband superconductivity. In the last decades, with the discovery of multiband superconductors, the spectrum of potential applications has greatly widened. READ MORE

  6. 4. The growth of waves by wind as a problem in nonequilibrium statistical mechanics

    Author : Anthony Bonfils; John Wettlaufer; Kristian Gustafsson; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; out-of-equilibrium system; fluctuation spectrum; oscillatory force; classical Casimir effect; non-linear waves; wave turbulence; wind-wave coupling.; teoretisk fysik; Theoretical Physics;

    Abstract : In 1948, Casimir predicted a net attractive force between two perfectly conducting parallel plates due to electromagnetic vacuum fluctuations. By analogy, the interaction of two ships on a wavy sea has been named Maritime Casimir effect. This is an example of force generation in non-equilibrium systems. READ MORE

  7. 5. Optimisation and control of shear flows

    Author : Antonios Monokrousos; Dan S. Henningson; Laurette Tuckerman; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; shear flows; flow control; optimal disturbances; Lagrange method; transition to turbulence; non-linear dynamics; Engineering mechanics; Teknisk mekanik;

    Abstract : Transition to turbulence and flow control are studied by means of numerical simulations for different simple shear flows. Linear and non-linear optimisation methods using the Lagrange multiplier technique are employed. READ MORE