Sökning: "uniform grid"

Visar resultat 11 - 15 av 20 uppsatser innehållade orden uniform grid.

  1. 11. Fast-forward the Sedimentation of Solid Particles in Protoplanetary Disks

    Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

    Författare :Eric Andersson; [2017]
    Nyckelord :protoplanetary disk sedimentation simulation particle-mesh adaptive particles; Physics and Astronomy;

    Sammanfattning : Numerical simulations have become an essential tool for studying particle-gas systems. One such system is the protoplanetary disk consisting of vast number of solid particles interacting with the surrounding gas. LÄS MER

  3. 12. Method Development for Heat Transfer Predictions in Channel Flows : An efficient CFD approach for ribbed stationary channels

    Master-uppsats, Linköpings universitet/Mekanisk värmeteori och strömningslära

    Författare :Martin Leskovec; [2016]
    Nyckelord :CFD; roughened channels; heat transfer coefficient; HTC; Nu number; CAE process;

    Sammanfattning : Gas turbines are today used in numerous industrial and aeronautical applications. To increase the specific power output and efficiency, a high turbine inlet gas temperature is desired. The high temperature leads to the need of cooling critical components in the hot gas path. LÄS MER

  4. 13. Feature-Feature Matching For Object Retrieval in Point Clouds

    Master-uppsats, KTH/Datorseende och robotik, CVAP

    Författare :Michal Staniaszek; [2015]
    Nyckelord :;

    Sammanfattning : In this project, we implement a system for retrieving instances of objects from point clouds using feature based matching techniques. The target dataset of point clouds consists of approximately 80 full scans of office rooms over a period of one month. The raw clouds are reprocessed to remove regions which are unlikely to contain objects. LÄS MER

  5. 14. Geant4 simulations of neutron flux using automated weight windows with applications to ESS

    Master-uppsats, Lunds universitet/Fysiska institutionen

    Författare :John Stenander; [2015]
    Nyckelord :Geant4; Spallation sources; Weight windows; Variance reduction; Physics and Astronomy;

    Sammanfattning : This thesis investigates the use of two automated weight window methods for variance reduction of flux in particle transport simulations. The methods are implemented in the Geant4 simulation software. Both methods are based on pre-simulations, using flux or relative error information as input. LÄS MER

  7. 15. Focal Operations with Network Distance Based Neighbourhoods : Implementation, Application and Visualization

    Kandidat-uppsats, KTH/Geoinformatik

    Författare :Nore Ottenby; [2015]
    Nyckelord :GIS; Map algebra; Focal sum; Focal Proximity; Network Analysis; Network Space; Location Problem; City Planning; Arcpy; Density map; Hotspot map;

    Sammanfattning : In spatial analysis, many operations are performed considering the neighbouring locations of a feature. The standard definition of a neighbourhood is an area confined by geometrical length and direction with respect to its focus. When allocating a location for a service, the population distribution is often considered. LÄS MER