Sökning: "Multi-scale modelling"

Visar resultat 1 - 5 av 7 uppsatser innehållade orden Multi-scale modelling.

  1. 1. Analysis of Hall effect thrusters using Hybrid PIC simulations and coupling to EP plume

    Master-uppsats, Luleå tekniska universitet/Rymdteknik

    Författare :David Villegas Prados; [2020]
    Nyckelord :Hallis; SPIS; EP; plume; hybrid PIC; Hall effect; HET; inside channel; plume expansion;

    Sammanfattning : In the last 30 years, numerical models have been developed to properly analyze Hall eect thrusters (HET),leading to a bridge between analytical prediction/empirical intuition and experiments. For companies in thespace sector, these codes serve to much more than simply simulating the thruster, but it provides a fast, cheapand reliable tool for processes such as validation and verication procedures, as well as for technical developmentof the thruster. LÄS MER

  2. 2. Multi-scale modelling of fire in accelerator tunnels: a CERN case study

    Master-uppsats, Lunds universitet/Avdelningen för Brandteknik

    Författare :Melchior Schepers; [2018]
    Nyckelord :Multi-scale modelling; CFD; tunnel fires; FDS; CERN; particle accelerator; Technology and Engineering;

    Sammanfattning : Multi-scale modellering is een nieuwe benadering in het modelleren van rook en brand in systemen waarbij de grootte van het domein een meer conventionele volledige 3D modellering onmogelijk maakt. Het domein wordt opgesplitst in een 1D en 3D gedeelte om zo de simulatietijd te verminderen. LÄS MER

  3. 3. Towards the measurement of two independent viscoelastic functions using spherical indentation

    Master-uppsats, KTH/Hållfasthetslära (Inst.)

    Författare :Hassan Mohammad; [2016]
    Nyckelord :;

    Sammanfattning : Instrumented indentation is a promising testing technique for obtaining the time dependent viscoelastic properties of bitumen and bitumen-based mastics. It offers several advantages: controlling the length scale of measurement and thus could be used in multi-scale modelling of asphalt, the possibility of in-situ tests and the minimal requirements of sample preparation. LÄS MER

  4. 4. Exploring the use of 3D GIS as an analytical tool in archaeological excavation practice

    Master-uppsats, Lunds universitet/Arkeologi

    Författare :Sjoerd Van Riel; [2016]
    Nyckelord :archaeology; digital archaeology; 3D models; 3D 4D GIS; photogrammetry; LIDAR; laser scanning; excavation methodology; excavation documentation; archaeological drawing methods; reflexivity; landscape archaeology; History and Archaeology;

    Sammanfattning : Several digital technologies are now available to record and document archaeological excavations. A large number of studies have been published concerning the use of laser scanning, image based 3D modelling and GIS. LÄS MER

  5. 5. Simulation of proteins in crowded environments using coarse-graining methods

    Master-uppsats, Lunds universitet/Beräkningsbiologi och biologisk fysik; Lunds universitet/Fysiska institutionen

    Författare :Björn Linse; [2016]
    Nyckelord :Proteins; atomistic model; multi-scale modelling; Monte Carlo simulation; relative entropy; Physics and Astronomy;

    Sammanfattning : Of increasing interest in the field of protein modelling and simulation is the effects of crowding. In a living cell, large molecules can take up 30% of the cell plasma volume, and affects the folding and dynamics of proteins. LÄS MER