ECVT Researches at The Ohio State University

  • Gas-Solid Fluidization: ECVT Imaging and Mini-/Micro-Channel Flow

    Fei Wang, M.S.
    PhD Thesis, Chemical and Biomolecular Engineering, The Ohio State University, 2010

    ABSTRACT: Fluidized beds provide good mass and heat transfer characteristics, temperature homogeneity, high flowability of particles, and high mixing rates between solid particles and gas. Gas-solid fluidized beds have been employed extensively in chemical, petrochemical, metallurgical, food, and pharmaceutical industries. A comprehensive understanding of the complex hydrodynamics and transport phenomena in gas-solid fluidized beds are required for successful application of these systems in industry

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  • Hydrodynamics And Flow Structure, Gas And Solids Mixing Behavior, And Choking Phenomena In Gas-Solid Fluidization

    Bing Du
    PhD Thesis, Chemical and Biomolecular Engineering, The Ohio State University, 2005

    ABSTRACT: The turbulent fluidization regime, bound between the bubbling and the fast fluidization regimes, is characterized by vigorous movements of both the particles/clusters and bubbles/voids of irregular shapes. This regime offers distinct operational advantages over the bubbling and fast fluidization regimes, such as vigorous gas-solids contacting, high solids hold-up, high exchange rate of the gas between the void and the emulsion phases, and relative spatial uniformity in flow properties. Despiteits practical importance, turbulent fluidization received much less attention than other fluidization regimes such as the bubbling, the slugging and the fast fluidization regimes. In this study, the dynamic flow be havior and gas and solids mixing behavior in the turbulent fluidized beds are investigated by using Electrical Capacitance Tomography (ECT) technique and tracer technique.

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  • Advances in Electrical Capacitance Tomography

    Qussai Marashdeh
    PhD Thesis, Dept of Electronic Science, The Ohio State University, 2006

    ABSTRACT: Electrical tomography techniques for process imaging are very prominent for industrial applications due to their low cost, safety, high capture speed, and suitability for different vessel sizes. Among electrical tomography techniques, electrical capacitance tomography has been the subject of extensive recent research due to its non-invasive nature and capability of differentiating between different phases based on permittivity distribution. Research in electrical capacitance tomography is inherently interdisciplinary, and areas of research in it can be categorized as: (1) sensor design, (2) hardware electronics, (3) and image reconstruction. Work presented in this dissertation includes developments in image reconstruction and sensor design.

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