Search for dissertations about: "instabilities"

Showing result 6 - 10 of 246 swedish dissertations containing the word instabilities.

  2. 6. Numerical investigation of curvature driven instabilities in toroidal plasmas

    Author : Bhanpersad Jhowry; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; FLR effects; ITG-mode; toroidal instabilities; convecting damping; ballooning mode;

    Abstract : .... READ MORE

  4. 7. Higher harmonic cavities at 3rd generation synchrotron light sources

    Author : Mattias Georgsson; Lunds universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Double RF system; Electron storage ring; Instabilities; Landau damping; Beam lifetime; Physics; Synchrotron radiation; Fysik;

    Abstract : Synchrotron radiation is a tool widely used in science. It is produced by electron accelerators called storage rings. With the high performance of the 3rd generation synchrotron light sources, the scientific results are excellent. It is important to identify and overcome the limitations of a storage ring in order to enhance its performance. READ MORE

  5. 8. Flow instabilities in centrifugal compressors at low mass flow rate

    Author : Elias Sundström; Mihai Mihaescu; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Centrifugal compressor; flow instabilities; rotational flows; rotating stall; surge; compressible Large Eddy Simulation; Engineering Mechanics; Teknisk mekanik;

    Abstract : A centrifugal compressor is a mechanical machine with purpose to convert kineticenergy from a rotating impeller wheel into the fluid medium by compressingit. One application involves supplying boost air pressure to downsized internalcombustion engines (ICE). READ MORE

  6. 9. Transport Barriers in Plasmas and Fluids

    Author : Robert Moestam; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; DNS; transport barriers; Zonal flows; L-H mode transition; turbulence simulations; drift waves; flux tube simulations; nonlinear instabilities; linear instabilities;

    Abstract : In the present work different mechanisms for generation and suppression of turbulence are studied. The suppression of nonlinearly generated turbulence stabilized by temperature boundary conditions as well as turbulence generated by linear instabilities and suppressed by nonlinearly generated secondary flows are treated. READ MORE

  7. 10. Inflation Mechanics of Hyperelastic Membranes

    Author : Amit Patil; Anders Eriksson; Arne Nordmark; Reijo Kouhia; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Membrane Mechanics; Inflation; Adhesive Contact; Instabilities; Bifurcation; Limit Point; Teknisk mekanik; Engineering Mechanics;

    Abstract : The applications of inflatable membrane structures are increasing rapidly in the various fields of engineering and science. The geometric, material, force and contact non-linearities complicate this subject further, which in turn increases the demand for computationally efficient methods and interpretations of counter-intuitive behaviors noted by the  scientific community. READ MORE