Search for dissertations about: "dispersion fibre"

Showing result 1 - 5 of 41 swedish dissertations containing the words dispersion fibre.

  1. 1. Two-phase flows in gas-evolving electrochemical applications

    University dissertation from Stockholm : Mekanik

    Author : Ruben Wetind; KTH.; [2001]
    Keywords : two-phase flow; electrochemical; gas-evolving; chlorate process; micro-bubbles; two-fluid model; numerical modelling; mixture model; drift-flux model; gas-evolving; electrolysis; current distribution; dispersion; image analysis; laser-sheet; fibre;

    Abstract : .... READ MORE

  2. 2. Pulp displacement washing - An investigation of the influence of fibre and bed properties using a novel measurment technique

    University dissertation from Stockholm : Mekanik

    Author : Jenny Lindau; [2008]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; displacement washing; pulp properties.; measurement technique; compression; dispersion; fibre damage; local properties; kraft pulp;

    Abstract : There are many incentives for making the pulp washing process as efficient as possible: an efficient separation of the pulp from the black liquor will increase energy efficiency, reduce costs by minimizing the need for make-up chemicals and improve the bleaching process. Research in this area has, however, been more or less neglected and in the existing literature there are many discrepancies as to how different parameters influence the washing process. READ MORE

  3. 3. Fibre Orientation Modelling Applied to Contracting Flows Related to Papermaking

    University dissertation from Stockholm : KTH

    Author : Marko Hyensjö; KTH.; [2008]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fokker-Planck; fibre orientation; shear flow; fibre suspension; planar contraction; headbox; turbulent flow; TECHNOLOGY Engineering mechanics Other engineering mechanics; TEKNIKVETENSKAP Teknisk mekanik Övrig teknisk mekanik;

    Abstract : The main goal of this work was to develop numerical models for studying the behaviour of fibres in an accelerated flow. This is of special interest for e.g. papermaking. READ MORE

  4. 4. Transitional and turbulent fibre suspension flows

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Mathias Kvick; KTH.; [2014]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fluid mechanics; fibre suspension; turbulence; laminar-turbulent transition; image analysis; hydrodynamic stability; cellulose nanofibrils.; Teknisk mekanik; Engineering Mechanics;

    Abstract : In this thesis the orientation of macro-sized fibres in turbulent flows is studied, as well as the effect of nano-sized fibrils on hydrodynamic stability. The focus lies on enabling processes for new materials where cellulose is the main constituent. READ MORE

  5. 5. Phase Modulation Techniques for On-Off Keying in Optical Fibre Transmission

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Marco Forzati; [2007]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; return-to-zero; fibre optics communication; phase modulation; nonlinear optics; dispersion management; high-speed optical transmission; modulation formats; fibres;

    Abstract : Increasing the channel bit rate is an efficient way to upgrade traffic capacity in installed transmission links. At bit rates of the order of 40 Gb/s, on-off keying (OOK) transmission becomes severely impaired by non-linear effects especially Intra-channel Four-Wave Mixing (IFWM) which limit the power at which the signal can be transmitted, and ultimately the transmission distance. READ MORE