Sökning: "diffusion modeling"

Visar resultat 1 - 5 av 206 avhandlingar innehållade orden diffusion modeling.

  1. 1. Modeling of Hindered Diffusion in Gels

    Författare :Jan Gutenwik; Avdelningen för kemiteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; effective diffusion coefficient; pore size distribution; obstruction; immobilization; modeling; adsorption kinetics; hindered diffusion; simulation program; proteins; Chemical technology and engineering; Kemiteknik och kemisk teknologi;

    Sammanfattning : Hindered diffusion occurs in the most different processes, as has been described in this thesis. It is very important to have an understanding of the influence of hindered diffusion on the mass transfer rate, especially when competing rate processes are acting simultaneously. LÄS MER

  3. 2. Diffusion in Bone Tissue

    Författare :Gustav Lindberg; Hållfasthetslära; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; bone growth; diffusion; stress enhanced; finite element method; steady-state; periosteal membrane; diffusion in bovine bone; diffusion experiment; Conductivity measurement; Fick’s law; Fourier series; Kalman filter; transient solution;

    Sammanfattning : In order to prevent or modify the processes of bone degeneration the modeling and remodeling of bone tissue must be better understood. In this thesis it is assumed that the primary condition leading to bone growth is a change of the chemical environment caused by transport of matter resulting from stress driven diffusion. LÄS MER

  4. 3. Diffusion in Poly(vinyl alcohol) and Polyethylene as Determined by Computational Simulations and Modeling

    Författare :Gunnar Karlsson; KTH; []
    Nyckelord :Molecular dynamics; simulation; modeling; polymer; poly vinyl alcohol ; polyethylene; water; oxygen; limonene; solute; diffusion; transport properties;

    Sammanfattning : Poly(vinyl alcohol) and polyethylene polymer systems werebuilt in order to study their transport properties (diffusion).First a verification of the AMBER force field was conducted fora poly(vinyl alcohol) system built from a chain with 145repeating units. NPT-molecular dynamics simulations attemperatures between 400 and 527 K were performed. LÄS MER

  5. 4. Metal film growth on weakly-interacting substrates : Multiscale modeling

    Författare :Víctor Gervilla Palomar; Kostas Sarakinos; Georgios Almyras; Davide Giuseppe Sangiovanni; Michael Tringides; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Thin films are nanoscale layers of material used to functionalize surfaces or to serve as building blocks in more complex devices. In recent years, thin metal films have become vital for modern devices within, e.g. LÄS MER

  7. 5. Diffusion Controlled Drug Release from Slurry Formed, Porous, Organic and Clay-derived Pellets

    Författare :Erik Jämstorp Berg; Maria Strømme; Håkan Engqvist; Susanne Bredenberg; Pentti Tengvall; Nanoteknologi och funktionella material Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Diffusion; Drug delivery; Antithrombotic drugs; Highly potent opioids; Modeling; Clays; Polymers; Pellets; Beads; Materialvetenskap; Materials Science;

    Sammanfattning : Coronary artery disease and chronic pain are serious health issues that cause severe discomfort and suffering in society today. Antithrombotic agents and highly potent analgesics play a critical role in improving the recovery process for patients being treated for these diseases. LÄS MER