Search for dissertations about: "Anders Dahlkild"

Showing result 11 - 15 of 15 swedish dissertations containing the words Anders Dahlkild.

  2. 11. Modelling the Production and Propagation of Sound in Individual Human Vocal Tracts

    Author : Lukas Schickhofer; Mihai Mihaescu; Anders Dahlkild; Manfred Kaltenbacher; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Biomechanics; Vocal Tract Acoustics; Numerical Flow Simulation; Fluid-Structure Interaction;

    Abstract : Voice generation and the expression through speech are of vital importance for communication. The human upper airways are the origin of the process of speech production, which involves a modulation of the periodically pulsed pressure from the lungs by the vocal tract volume. READ MORE

  4. 12. Sound Generation and Propagation in the Human Upper Airways

    Author : Lukas Schickhofer; Mihai Mihaescu; Anders Dahlkild; Mats Karlsson; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Engineering Mechanics; Teknisk mekanik;

    Abstract : The human upper airways embrace the source of phonation and affect the modulation of the voice, which is of vital importance for communication. Moreover, unwanted sounds may be generated in the upper airways due to elastic, collapsible parts that are susceptible to flow-induced vibration and resonance. READ MORE

  5. 13. Modelling and Experimental Investigation of the Dynamics in Polymer Electrolyte Fuel Cells

    Author : Katarina Wiezell; Göran Lindbergh; Lars Pettersson; Anders Dahlkild; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; polymer electrolyte fuel cell; modelling; electrochemical impedance spectroscopy; water transport; membrane; Electrochemistry; Elektrokemi;

    Abstract : In polymer electrolyte fuel cells (PEFC) chemical energy, in for example hydrogen, is converted by an electrochemical process into electrical energy. The PEFC has a working temperature generally below 100 °C. Under these conditions water management and transport of oxygen to the cathode are the parameters limiting the performance of the PEFC. READ MORE

  6. 14. Eulerian Numerical Study of the Sedimentation of Fibre Suspensions

    Author : Feng Zhang; Anders Dahlkild; Fredrik Lundell; Staffan Lundström; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fokker-Planck equation; particle fluid flow; suspension; instability;

    Abstract :  Sedimenting suspensions exist in a varity of natural phenomena and industrial applications. It is already observed in experiments that the dilute fibre suspensions experience a hydrodynamics instability under gravity at low Reynolds numbers. Initially well-mixed suspensions become inhomogeneous and anisotropic due to this instability. READ MORE

  7. 15. Instability in Settling Fibres : A Numerical Study

    Author : Feng Zhang; Anders A. Dahlkild; Fredrik Lundell; Mark Martinez; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; bre suspensions; sedimentation; instability; mixture model; point-particle mode;

    Abstract : Sedimenting suspensions exist in a varity of natural phenomena and industrial applications. It is already observed in experiments that the dilute fibre suspensions experience a concentration instability under gravity at low Reynolds numbers. Initially well-mixed suspensions become inhomogeneous and anisotropic due to this instability. READ MORE