Sökning: "turbulent dispersion"

Visar resultat 1 - 5 av 27 avhandlingar innehållade orden turbulent dispersion.

  1. 1. Particle-laden Turbulent Wall-bounded Flows in Moderately Complex Geometries

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Azad Noorani; KTH.; [2015]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; turbulent; complex geometry; particle; Teknisk mekanik; Engineering Mechanics;

    Sammanfattning : Wall-bounded turbulent dispersed multiphase flows occur in a variety of industrial, biological and environmental applications. The complex nature of the carrier and the particulate phase is elevated to a higher level when introducing geometrical complexities such as curved walls. LÄS MER

  2. 2. Transitional and turbulent fibre suspension flows

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

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

    Sammanfattning : 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. LÄS MER

  3. 3. Simulations of turbulent dispersion in the atmospheric boundary layer

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Anders Andrén; Uppsala universitet.; [1989]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : .... LÄS MER

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

    Detta är en avhandling från Xiaoyun Tu, Division of Food Engineering, Department of Food Technology, Engineering and Nutrition

    Författare :Xiaoyun Tu; Lunds universitet.; Lund University.; [2004]
    Nyckelord :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;

    Sammanfattning : 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). LÄS MER

  5. 5. Numerical study on flow and pollutant dispersion inside street canyons

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Yang Yunkai; KTH.; [2013]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Flow; Pollutant dispersion; CFD; Street canyon; Reliability; SRA - Energy; SRA - Energi;

    Sammanfattning : This thesis analyzes the characteristics of flow pattern and vehicle-emitted pollutant dispersion in roughness surface layer. In an urban environment, wind flow and transported-pollutant source interfere strongly with buildings and other roughness elements on the surface ground, which results in complex characteristics of flow pattern and pollutant dispersion in 3D circumstances. LÄS MER