Sökning: "bubble"

Visar resultat 16 - 20 av 174 avhandlingar innehållade ordet bubble.

  1. 16. "English Philology is just a Bubble" : Unconventional Metaphors in English as a Lingua Franca

    Författare :Sebastian Malinowski; Andrea C. Schalley; Erica Sandlund; Marie Tåqvist; Hans-Jörg Schmid; Karlstads universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; unconventional metaphors; creativity; conceptual metaphor theory; English as a lingua franca; objectivity; survey; FrameNet; English; Engelska;

    Sammanfattning : The present thesis investigates unconventional metaphors in English as a Lingua Franca (ELF). Empirical approaches in metaphor research have gained prominence, yet methodologies could benefit from more transparent procedural descriptions and efforts to decrease researcher intuition in the data analysis. LÄS MER

  3. 17. Numerical frameworks for small-scale bubble dynamics

    Författare :Niklas Hidman; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; multiphase; phase change; DNS; moving reference frame; Bubbly flows; cavitation; laser-induced;

    Sammanfattning : Designing efficient bubbly flow systems requires the prediction of the dynamics of the bubbles, the liquid and how the gas and liquid phases interact. Currently, the complex dynamics in bubbly flows are not yet fully explained, and we rely on incomplete models in our numerical methods. LÄS MER

  4. 18. Numerical simulation and analysis of multi-scale cavitating flows using a hybrid mixture-bubble model

    Författare :Ebrahim Ghahramani; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Homogeneous mixture model; Lagrangian bubble model; CFD; Cavitation; OpenFOAM; Multiphase flow; Hybrid model; Multi-scale;

    Sammanfattning : The aim of this research is to model and analyse multi-scale cavitating flows with a certain emphasis on small sub-grid vapour structures. Cavitating flows include vapour structures with different length scales, from micro-bubbles to large cavities. LÄS MER

  5. 19. Fuel dispersion and bubble distribution in fluidized beds

    Författare :Johanna Olsson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : Fluidized bed technology is used for thermal conversion of solid fuels (combustion and gasification) and is especially suitable for conversion of low-rank fuels such as biomass and waste. The performance of fluidized bed units depends on the fuel mixing and fuel-gas contact. LÄS MER

  7. 20. A Realizable Hybrid Mixture-Bubble Model for Cavitating Flows

    Författare :Ebrahim Ghahramani; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Multi-scale model; Homogeneous mixture model; Cavitation; Disperse multiphase flow; Eulerian-Lagrangian model; OpenFOAM;

    Sammanfattning : Cavitating multi-phase flows include an extensive range of cavity structures with different length scales, from micro bubbles to large sheet cavities that may fully cover the surface of a device. To avoid high computational expenses, incompressible transport equation models are considered a practical option for simulation of large scale cavitating flows, normally with limited representation of the small scale vapour structures. LÄS MER