Search for dissertations about: "Particle length"

Showing result 21 - 25 of 120 swedish dissertations containing the words Particle length.

  1. 21. A Particle Image Velocimetry Study of Bubbly Gas-Liquid Flow

    University dissertation from Xiaoyun Tu, Division of Food Engineering, Department of Food Technology, Engineering and Nutrition

    Author : Xiaoyun Tu; Lund University.; Lunds universitet.; [2004]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; turbulent dispersion; Food and drink technology; Livsmedelsteknik; turbulence; Rushton turbine; stirred tank; slip velocity; bubbly gas liquid two-phase flow; coherent structure; CCD camera; PIV; POD;

    Abstract : The aim of this work is to build a framework that can be used for characterizing the bubbly gas liquid turbulent flow in the stirred bioreactor tank. To this end we have developed and modified techniques with which to measure the velocity of both dispersed gas and carrier liquid phases by the optical measurement technique, a 2-CCD camera Particle Image Velocimetry (PIV) system; and to characterize the turbulence by the wavelets tool, Proper Orthogonal Decomposition (POD). READ MORE

  2. 22. Enzyme Immobilization in Mesoporous Silica

    University dissertation from Xiaoyun Tu, Division of Food Engineering, Department of Food Technology, Engineering and Nutrition

    Author : Hanna Gustafsson; [2012]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mesoporous; particle morphology; encapsulation; immobilization; lipase; trypsin; pore size; silica; enzyme; feruloyl esterase;

    Abstract : Catalysts are widely used in many industries for production of chemicals, pharmaceuticals, fuels and energy. There is a need for more sustainable production processes, with reduced energy and raw material consumption together with a reduction in waste and toxic by-products. READ MORE

  3. 23. Colloidal interactions obtained from total internal reflection microscopy measurements and scattering data

    University dissertation from Xiaoyun Tu, Division of Food Engineering, Department of Food Technology, Engineering and Nutrition

    Author : Moheb Nayeri; Göteborgs universitet.; Gothenburg University.; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; total internal reflection microscopy; colloidal stability; van der Waals interaction; Debye length; surfactants; depletion; scattering;

    Abstract : The scattering of radiation can be used to extract information about the interactions between colloidal (10^{-7}-10^{-3} cm radius) particles suspended in liquids. As colloidal interactions incorporate entropic effects they are weak and while system specific they are governed by a number of general mechanisms. READ MORE

  4. 24. Prognostics and Health Management of Engineering Systems for Operation and Maintenance Optimisation

    University dissertation from Luleå : Luleå University of Technology

    Author : Madhav Mishra; Luleå tekniska universitet.; [2018]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Prognostics and Health Management PHM ; Diagnostics; Prognostics; Bayesian; Hierarchical; L10; Prediction; Bearing; Li-ion battery; RUL; Particle filter; Model-based; Data-driven; Algorithms; Railway track geometry; Drift och underhållsteknik; Operation and Maintenance;

    Abstract : Prognostics and health management (PHM) is an engineering discipline that aims to maintain system behaviour and function and ensure mission success, safety and effectiveness. Prognostics is defined as the estimation of remaining useful life. READ MORE

  5. 25. Orientation of elongated, macro and nano-sized particles in macroscopic flows

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Karl Håkansson; KTH.; [2014]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Orientation; fibre; fibril; turbulent channel flow; particle streaks; flow focusing; cellulose nanofibrils; extensional flow; Smoluchowski; rotary diffusion;

    Abstract : Non-spherical particles are present all around us, in biological, industrial and environmental processes. Making predictions of their impact on us and systems in our vicinity can make life better for everyone here on earth. READ MORE