Search for dissertations about: "deflagration"

Showing result 1 - 5 of 7 swedish dissertations containing the word deflagration.

  2. 1. Flame Dynamics and Deflagration-to-Detonation Transition

    Author : Damir Valiev; Börje Johansson; R. J. M. (Rob) Bastiaans; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; flame; premixed; instability; fractal; deflagration; detonation; DDT; simulation; Physics; Fysik;

    Abstract : Various premixed flame phenomena are studied by means of direct numerical simulations of the complete system of hydrodynamic equations. Rigorous study of flame dynamics is essential for all premixed combustion problems where multidimensional effects cannot be disregarded.The present thesis consists of six parts. READ MORE

  4. 2. The role of Landau-Darrieus instability in flame dynamics and deflagration-to-detonation transition

    Author : Damir Valiev; Börje Johansson; Vladimir Karlin; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; flame; premixed; instability; front; Landau; Darrieus; fractal; freely; deflagration; detonation; transition; DDT; modeling; simulation; Other materials science; Övrig teknisk materialvetenskap;

    Abstract : The role of intrinsic hydrodynamic instability of the premixed flame (known as Landau-Darrieus instability) in various flame phenomena is studied by means of direct numerical simulations of the complete system of hydrodynamic equations. Rigorous study of flame dynamics and effect of Landau-Darrieus instability is essential for all premixed combustion problems where multidimensional effects cannot be disregarded. READ MORE

  5. 3. Magnetic deflagration and detonation in crystals of nanomagnets

    Author : Oleksii Iukhymenko; Claude Dion; Javier Tejada; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Nanomagnets; magnetic deflagration; front instability; Zeeman energy; magnetic instability; magnetic detonation; weak detonation; Physics Of Matter; materiefysik;

    Abstract : In this thesis we cover the dynamics of the macro magnetic transformations (spin avalanches) in crystals of molecular nanomagnets, also known as magnetic deflagration and detonation.Taking a single-molecule Hamiltonian, we calculate the dependence of Zeeman energy and the activation energy as a function of an external magnetic field at different angles relative to the easy axis of the crystal. READ MORE

  6. 4. Fronts and instabilities in laser ablation, organic semiconductors and quantum media

    Author : Mikhail Modestov; Vitaly Bychkov; Mattias Marklund; Tito Mendonca; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; front; instability; deflagration; fysik; Physics;

    Abstract : The concept of a front plays a decisive role in various elds in physics and beyond. In the present thesis we study key aspects of front dynamics and stability in the context of laser plasmas, organic semiconductors and quantum media. READ MORE

  7. 5. Type Ia Supernovae : Homogeneity and Diversity

    Author : Gabriele Garavini; Ariel Goobar; David Branch; Stockholms universitet; []
    Keywords : Physics;

    Abstract : The use of type Ia supernovae as distance estimators has shown that about 75% of the energy content of the universe has a negative equation of state parameter and thus, drives the acceleration of the universe. Constraining the exact nature of this energy is one of the main goals in cosmology. READ MORE