Essays about: "Polymer Dynamics"

Showing result 1 - 5 of 15 essays containing the words Polymer Dynamics.

  1. 1. Cable Shape Optimization - Drag Reduction of Cables Used in Marine Applications

    University essay from KTH/Teknisk mekanik

    Author : Simon Garpenquist; [2023]
    Keywords : Wind Tunnel Experiment; Computational Fluid Dynamics; Aerodynamic Forces; Drag Reduction; Shape Optimization; Flow around Cylinders; Yacht Racing;

    Abstract : It is important to understand the aerodynamic properties of tensioned cables (e.g. used in suspension bridges and yacht riggings), both for drag reduction and vibrational suppression purposes. READ MORE

  3. 2. Temporal Dynamics In Microplastics Within An Indoor Environment: Insights From A Novel Tape-Lifting Method

    University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Author : Matilda Wiklund; [2022]
    Keywords : Microplastics; tape-lifting; atmospheric fallout; urban environments; Mikroplast;

    Abstract : Microplastics (MPs) constitute a risk to both human and environmental health. It is vital to identify sources and pathways to take the necessary action and limit the number of MPs in our environments. However, we currently have a limited understanding regarding MPs' variation with time in urban environments in an indoor setting. READ MORE

  4. 3. Study of hole mobility in amorphous polyethylene via kinetic Monte Carlo methods

    University essay from KTH/Matematik (Avd.)

    Author : Hannes Aspåker; [2022]
    Keywords : ;

    Abstract : This thesis presents a study of hole mobility in amorphous polyethylene using kinetic Monte Carlo (KMC) methods together with a novel chain segmentation model developed by Unge and Nilsson, which determines hole localization sites based on torsion angles along the polymer chain. An extension to the KMC algorithm was developed which improves performance by modelinground-trips between strongly interconnected localization sites. READ MORE

  5. 4. First principles DFT study of polyethylene insulation containing chemical impurities - implementing counterpoise correction

    University essay from KTH/Tillämpad fysik

    Author : Max Pierre; [2022]
    Keywords : Applied physics; HVDC cable; Polymer physics; Polyethylene; Density functional theory; Molecular dynamics; CP2K; GROMAC; Electron traps; Band gaps; Density of states; Tillämpad fysik; HVDC kabel; Polymerfysik; Polyeten; Täthetsfunktionalteori; Molekulärdynamik; CP2K; GROMACS; Elektronfällor; Bandgap; Tillståndstäthet;

    Abstract : Density functional theory (DFT) calculations of polyethylene (PE) HVDC cable insulation have been performed for systems containing four different chemical impurities: acetophenone, cumene, $\alpha$-methyl styrene and $\alpha$-cumyl alcohol. Systems were generated by molecular dynamics (MD) equilibration at four different temperatures relevant for cable insulation applications: 277 K, 293 K, 343 K and 363 K. READ MORE

  6. 5. Calculation of neutron scattering libraries for liquid ortho-deuterium and hydrogen deuteride

    University essay from Lunds universitet/Kärnfysik; Lunds universitet/Fysiska institutionen

    Author : Alexander Huusko; [2022]
    Keywords : PIMD; NJOY; HD; D2; HighNESS; ESS; RPMD; TSL; Physics and Astronomy;

    Abstract : The European Spallation Source (ESS) has launched a project called HighNESS, with the task of investigating the potential of adding a second moderator system to the facility, with ortho-deuterium (o-D2) being the main material of interest. Another moderator material which could be of interest is hydrogen deuteride (HD). READ MORE