Sökning: "Surface roughness"

Visar resultat 1 - 5 av 235 uppsatser innehållade orden Surface roughness.

  1. 1. Inre erosion i tätjord av morän, laboratorieprovning

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Författare :Robin Edvinsson; [2024]
    Nyckelord :erosion; tätjord; morän; laboratorieprovning; kontakterosion;

    Sammanfattning : In the spring of 2022, large parts of an approximately 80-year-old earth fill dam in Burvattnet Jämtland were demolished. The demolished parts consisted of a homogeneous dust body of glacial moraine that was founded on soil. LÄS MER

  3. 2. Land Use and Land Cover Changes in Europe and the Impact on Near-Surface Wind Speed in Sweden

    Master-uppsats, Göteborgs universitet/Institutionen för geovetenskaper

    Författare :Nils Philipp Stange; [2023-08-18]
    Nyckelord :;

    Sammanfattning : Investigations of Land use and land cover change (LULCC) have recently become of increasing interest. This trend occurs not only based of the importance of biogeochemical processes such as carbon sequestration, but also because of their climate impacts caused by changed biogeophysical properties. LÄS MER

  4. 3. Morphological study of PS/PMMA-matrix on glass, related to vapour pressure, mass-fraction, and size

    Kandidat-uppsats, Karlstads universitet/Institutionen för ingenjörs- och kemivetenskaper (from 2013)

    Författare :Gustav Larsson; [2023]
    Nyckelord :organic solar cells; polymer; morphology; film; AFM;

    Sammanfattning : The objective of this study is to observe how changing amount or ratio between dried mixes of poly-methyl-methacrylate and poly-styrene change the surface appearance, and how the results might inform future design of Organic photovoltaic cells, whom are based on polymer mixtures and heavenly dependent on the arrangement of polymers. An atomic force microscope was used on glass surfaces coated in a poly-methyl-methacrylate/poly-styrene matrix and dried from either dichloromethane or ethyl-acetate to determine surface appearance. LÄS MER

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

    Master-uppsats, KTH/Teknisk mekanik

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

    Sammanfattning : 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. LÄS MER

  7. 5. Feasibility Study on Additive Manufacturing of Copper Windings using Electron Beam Melting

    Master-uppsats, KTH/Produktionsutveckling

    Författare :Marilena Wiele; Murad Abulawi; [2023]
    Nyckelord :Electron beam melting; Additive manufacturing; Electric motor windings; Hairpin windings; Winding design; Copper; Parameter optimization; Electrical conductivity; Elektronstrålesmältning; Additiv tillverkning; Elmotorlindningar; Hårnålslindningar; Lindningsdesign; Koppar; Parameteroptimering; Elektrisk ledningsförmåga;

    Sammanfattning : Within the framework of this thesis, the electron beam melting of pure copper for the purpose of producing electrical windings was examined. The conventional manufacturing process of copper windings was investigated, and the potential advantages offered by the design freedom inherent in the electron beam melting process were explored. LÄS MER