Search for dissertations about: "pdf"

Showing result 1 - 5 of 25396 swedish dissertations containing the word pdf.

  1. 1. Mathematical Modeling of Turbulent Reactive Flows

    University dissertation from Chalmers University of Technology

    Author : Mikael Mortensen; Chalmers tekniska högskola.; Chalmers University of Technology.; [2005]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Kemi; Chemistry; computational fluid dynamics; CFD; turbulent mixing; chemical reactions; conditional moment closure; CMC; presumed mapping function; PMF; probability density function; PDF;

    Abstract : The purpose of this thesis has been to study and develop mathematical models of non-premixed turbulent reacting flows. The models developed can be used both by the chemical process industry and for turbulent combustion applications. Furthermore, the models are general and not developed for any specific chemical or mechanical system. READ MORE

  2. 2. Design and application of experimental methods for steel sheet shearing

    University dissertation from Luleå University of Technology

    Author : Emil Gustafsson; Luleå tekniska universitet.; Högskolan Dalarna.; [2016]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hållfasthetslära; Solid Mechanics; Simulering av klippning i höghållfast stål;

    Abstract : Shearing is the process where sheet metal is mechanically cut between two tools. Various shearing technologies are commonly used in the sheet metal industry, for example, in cut to length lines, slitting lines, end cropping etc. READ MORE

  3. 3. Towards understanding breakage and flow in sublevel caving (SLC) Development of new measurement techniques and results from full-scale tests

    University dissertation from Luleå : Luleå tekniska universitet

    Author : Matthias Wimmer; Luleå tekniska universitet.; [2012]
    Keywords : Gruv- och Berganläggningsteknik; Mining and Rock Engineering;

    Abstract : Blast function, fragmentation and gravity flow are core elements for sublevel caving (SLC). For the ore recovery to be as high and the waste rock dilution as low as possible all three elements have to work as planned. READ MORE

  4. 4. Large Eddy Simulation of Turbulent Swirling Flows in Combustor Related Geometries

    University dissertation from Luleå : Luleå tekniska universitet

    Author : Yajing Wu; Lunds universitet.; Lund University.; [2013]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; swirler; Swirling flow; vortex breakdown; precessing vortex core PVC ; large eddy simulation LES .;

    Abstract : This thesis deals with the physics of turbulent swirling flows. Large eddy simulation (LES) method is used to investigate the vortex breakdown process, the precessing vortex core (PVC), and the effect of swirl number and flow field configuration on swirling flows. The study is based on an open source CFD code, \textit{OpenFoam}. READ MORE

  5. 5. Numerical Modelling of Fuel Injection and Stratified Turbulent Combustion in a Direct-Injection Spark-Ignition Engine Using an Open Source Code

    University dissertation from Chalmers University of Technology

    Author : Chen Huang; Chalmers tekniska högskola.; Chalmers University of Technology.; [2014]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; chemical mechanism; ignition delay; laminar flame speed; hollow-cone spray; KHRT; liquid penetration; SMD; gasoline surrogate; premixed stratified turbulent combustion; Flame Speed Closure FSC ; presumed PDF; Spray-Guided Gasoline Direct Injection engine; modelling; CFD; OpenFOAM;

    Abstract : Stringent regulations on the emission of pollutants, especially carbon dioxide (CO2), necessitate the development of advanced combustion technologies. Gasoline direct injection (GDI) into the combustion chamber of a Spark Ignition (SI) engine is a combustion strategy that is widely recognized as having the potential to improve fuel efficiency of internal combustion engines for passenger cars. READ MORE