Sökning: "Radial gradient"

Visar resultat 1 - 5 av 10 uppsatser innehållade orden Radial gradient.

  1. 1. Modelling Gas Flow Behaviour in Gas Atomizer

    Master-uppsats, KTH/Materialvetenskap

    Författare :Aravind Senan Vasanthasenan Reji; [2022]
    Nyckelord :Gas atomization; Nozzle; Velocity; Static pressure; Discrete phase model; Gasatomisering; Munstycke; Hastighet; Statiskt tryck; Diskret fasmodell;

    Sammanfattning : Gas atomization is regarded as a reliable method for creating high-quality metal powders from molten metal. The liquid metal is fed into the chamber as a free-falling stream through a nozzle, where it is impinged by high-velocity gas jets, causing degeneration and production of metal droplets, which solidify to create metal powders. LÄS MER

  3. 2. A Fractional Step Zonal Model and Unstructured Mesh Generation Frame-work for Simulating Cabin Flows

    Master-uppsats, Linköpings universitet/Mekanisk värmeteori och strömningslära

    Författare :Sergi Tarroc Gil; [2021]
    Nyckelord :Zonal Model; Thermal Comfort; Fluid Simulation; Aircraft Cabin Design; NURBS; Morphing; Radial Basis Functions; Meshing; Co-located Mesh; Unstructured Mesh; Mesh Quality; Mesh Smoothing; Enlarged Orientation Theorem; Fractional Step Method; Boussinesq; Adam Bashforth; Helmholtz-Hodge Theorem; Rhie and Chow; Difference Schemes; Gradient Evaluation; Differential Heated Cavity; Driven Cavity; Draught Rate;

    Sammanfattning : The simulation of physical systems in the early stages of conceptual designs has shown to be a key factor for adequate decision making and avoiding big and expensive issues downstream in engineering projects. In the case of aircraft cabin design, taking into account the thermal comfort of the passengers as well as the proper air circulation and renovation can make this difference. LÄS MER

  4. 3. The Milky Way and its Exoplanets

    Master-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

    Författare :Jesper Nielsen; [2021]
    Nyckelord :Planets and Satellites; Exoplanets; Occurrence Rates; Physics and Astronomy;

    Sammanfattning : The detections of over 4000 exoplanets as of today has shown that they exist in a wide range of different configurations, otherwise known as architectures. Recently, studies have been made trying to link the environment of host stars to the architectures of their planetary systems and have found that the architectures of planetary systems may not necessarily be uniform in the Milky Way. LÄS MER

  5. 4. Structural modifications of polyester fibres induced by thermal and chemical treatments to obtain high-performance fibres

    Master-uppsats, KTH/Fiber- och polymerteknologi

    Författare :Kartikeya Sharma; [2021]
    Nyckelord :PET fibres; P3HB fibres; Radial gradient; Chemical modification; Thermal annealing; High-performance fibres; PET-fibrer; P3HB-fibrer; Radiell lutning; Kemisk modifiering; termisk glödgning; högpresterande fibrer;

    Sammanfattning : Del A: Polyetylentereftalat fibrer I detta arbete presenteras olika metoder för att framställa monofilament av polyetylentereftalat (PET) (diameter: 30-50 µm) med en radiell gradient. Nyutvecklad Raman-spektroskopiteknik har använts för att kartlägga dessa inducerade radiella gradienter i t.ex. kristallinitet. LÄS MER

  7. 5. Large Surveys and Data-Driven Investigations of Radial Migration

    Master-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

    Författare :John Bradley Bowers; [2019]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : We probe the implications of 5 different previously developed models of the evolution of the Milky Way’s radial metallicity gradient for radial migration of stars observed today between 5kpc < R < 12kpc. Our sample contains 7167 giant stars, with metallicities and radial velocities obtained from APOGEE DR14, full 5-parameter kinematic information from Gaia DR2, and ages derived in Martig et al. LÄS MER