A quantitative study of diffusion in quasi-periodic fibre networks and complex porous media

Powell, Sean K. (2016) A quantitative study of diffusion in quasi-periodic fibre networks and complex porous media. PhD by Publication, Queensland University of Technology.


Diffusion is the fundamental process behind many molecular phenomena such as the mixing of substances. Its physical basis is the random motion of particles in a fluid. In complex porous media, diffusion is restricted by interactions with internal structures. In this work, we present studies of restricted diffusion that aim to efficiently produce quantitative models for obtaining detailed information about the morphology of biological porous media from diffusion tensor imaging experiments. We achieved this by developing a Langevin dynamics algorithm to provide physically realistic modelling of water/barrier interactions and the Lattice-Path Count algorithm to enumerate all available particle trajectories to evaluate molecular transport properties. We also performed diffusion tensor imaging experiments of the fibre networks of tissue engineering scaffolds. The findings of this thesis provide further insight into the physics underlying restricted diffusion.

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ID Code: 92506
Item Type: QUT Thesis (PhD by Publication)
Supervisor: Momot, Konstantin & Langton, Christian
Keywords: restricted diffusion, molecular dynamics, computer simulation, Monte-Carlo, Langevin dynamics, random walks, articular cartilage, diffusion tensor imaging, tissue engineering scaffold, interpretive model
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute of Health and Biomedical Innovation
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Institution: Queensland University of Technology
Deposited On: 19 May 2016 04:47
Last Modified: 28 Jun 2016 22:36

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