3 results for Jermy, M.C.

  • Application of a meta-analysis of aortic geometry to the generation of a compliant phantom for use in particle image velocimetry experimentation

    Huetter, L.; Geoghegan, P.H.; Docherty, P.D.; Lazarjan, M.S.; Clucas, D.; Jermy, M.C. (2015)

    Conference Contributions - Other
    University of Canterbury Library

    The evolution of pressure-flow geometry in the aortic arch is increasingly understood as a key element in the treatment of hemodynamic dysfunction in patients. However, little is known about the properties of the flow across the aortic geometry and thus the sensitivity of sensor placement is also unknown. Compliant models of the aortic path can be built to allow techniques such as particle image velocimetry to measure the velocity fields. This paper presents the justification and production methodology used to generate a compliant model of the aortic arch that represents the geometry and compliance of typical hemodynamics patients. The information from twenty papers was synthesized to generate a single model of the aortic arch. The model incorporates the three branching arteries at an apex of a tapering aortic path experimental that has been manufactured as a flexible thin-walled silicon model. Calculations were undertaken to ensure that the model matches the in vivo compliance of the arteries. The experimental setup uses the compliant silicone model of the aorta with variable flow pump to mimic the cardiac cycle, and a variable extramural pressure to mimic changes in intrathoracic pressure. This research was necessary for the development of an accurate experimental setup that would enable results that are immediately applicable to the research of cardiovascular therapy optimization.

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  • Development of a model for high precursor conversion efficiency pulsed-pressure chemical vapor deposition (PP-CVD) processing

    Cave, H.M.; Krumdieck, S.; Jermy, M.C. (2006)

    Conference Contributions - Published
    University of Canterbury Library

    A model of the movement of precursor particles in the unsteady Pulsed-Pressure Chemical Vapour Deposition (PP-CVD) process is developed to study the high conversion efficiencies observed experimentally in this process. Verification of the modelling procedures was conducted through a study of velocity persistence in an equilibrium gas and through Direct Simulation Monte Carlo (DSMC) simulations of unsteady self-diffusion processes. The model results demonstrate that in the PP-CVD process the arrival time for precursor particles at the deposition surface is much less than the reactor pump-down time, resulting in high precursor conversion efficiencies. Higher conversion efficiency was found to correlate with smaller size solvent molecules and moderate reactor peak pressure.

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  • Implementation of Unsteady Sampling Procedures for the Parallel Direct Simulation Monte Carlo Method

    Cave, H.M.; Tseng, K.-C.; Wu, J.-S.; Jermy, M.C.; Huang, J.-C.; Krumdieck, S.P. (2008)

    Journal Articles
    University of Canterbury Library

    accepted for publication 7th March 2008 JCOMP-D-07-00498R1

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