Sökning: "Bubble Coalescence"

Hittade 5 avhandlingar innehållade orden Bubble Coalescence.

  1. 1. Fluid Dynamics in Gas-Liquid Stirred Tank Reactors: Experimental and Theoretical Studies of Bubble Coalescence

    Författare :Rahman Sudiyo; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Computational Fluid Dynamics; Turbulence; Buoyancy; Bubble Coalescence; Multiphase Flow; High-Speed Video Imaging; Particle Image Velocimetry; Collision Mechanisms;

    Sammanfattning : This work deals with studies of bubble coalescence in turbulent flows of gas-liquid stirred tank reactors. Coalescence plays an important role in determining bubble size distribution, on which flow and mass transfer in such reactors largely depend. LÄS MER

  3. 2. Growth and Removal of Inclusions During Ladle Stirring

    Författare :Mats Söder; KTH; []
    Nyckelord :inclusions; ladle; gas-stirring; induction-stirring; secondary refining; bubble flotation;

    Sammanfattning : The growth and removal of inclusions in stirred ladles hasbeen studied. First, the importance of different growthmechanisms suggested in the literature were studied. Simulationresults from a fundamental model of an induction-stirred ladlehave been used as input in the calculations. LÄS MER

  4. 3. Thermodynamics and Kinetics in Metallurgical Processes - with a Special Focus on Bubble Dynamics

    Författare :Yu Liu; Mikael Ersson; Pär Göran Jönsson; Bjoern Glaser; Joaquín B. Ordieres-Meré; Yogeshwar Sahai; Birgit Palm; Ville-Valtteri Visuri; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ladle; EAF; gas bubbling; physical modeling; mathematical modeling; thermodynamics; Skänkmetallurgi; EAF; gasbubblor; experimentell modellering; matematisk modellering; termodynamik; Teknisk materialvetenskap; Materials Science and Engineering; Metallurgical process science; Metallurgisk processvetenskap;

    Sammanfattning : Gas stirring is commonly used in the steelmaking processes to reinforce chemical reactions, kinetic transfer, and inclusion removal, etc. This dissertation concentrates on multiphase flows with gas bubbling to study fluid dynamics and thermodynamics in metallurgical processes. LÄS MER

  5. 4. Numerical study of flows related to aerated stirred tanks

    Författare :Dragana Arlov; Strömningsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; plasma; fluiddynamik; Gaser; plasmas; fluid dynamics; Gases; Lattice Boltzmann method; Volume of Fluid; Aerated stirred tank; Large Eddy Simulation; Eulerian-Lagrangian model; Energy research; Energiforskning; Mechanical engineering; hydraulics; vacuum technology; vibration and acoustic engineering; Maskinteknik; hydraulik; vakuumteknik; vibrationer; akustik;

    Sammanfattning : The overall purpose with this work is to investigate the bubbly flow in a aerated stirred tank using numerical simulations. Aerated stirred tanks are commonly used in chemical processes for producing for example insulin and antibiotics. LÄS MER

  7. 5. Fabrication of Nanostructured Materials for Energy Applications

    Författare :Shanghua Li; Mamoun Muhammed; Sanjay Mathur; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Materials Chemistry; Materials chemistry; Materialkemi;

    Sammanfattning : World energy crisis has triggered more attention to energy saving and energy conversion systems with high efficiency. There is a growing awareness that nanoscience and nanotechnology can have a profound impact on energy generation, conversion, and recovery. LÄS MER