Sökning: "geometry pre-processing"

Visar resultat 1 - 5 av 9 uppsatser innehållade orden geometry pre-processing.

  1. 1. Streamlining 3D City Modeling for Urban Flow Simulations by Automatic Integration of Multisource Topography

    Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för fysik

    Författare :Klara Lindroth; [2023]
    Nyckelord :automatic 3D city models; surface reconstruction; geometry pre-processing; CFD; OSM height attributes;

    Sammanfattning : In the workflow of computational fluid dynamics, geometry preparation is commonly the most time-consuming step. For a fast CFD simulation, automatic surface reconstruction to obtain 3D city models for a chosen area is essential. To address this need, a literature study was conducted to map available data suitable for 3D city models. LÄS MER

  3. 2. Automatic processing of LiDAR point cloud data captured by drones

    Master-uppsats, Linköpings universitet/Institutionen för datavetenskap

    Författare :Leon Li Persson; [2023]
    Nyckelord :machine learning; supervised learning; random forest; point cloud segmentation;

    Sammanfattning : As automation is on the rise in the world at large, the ability to automatically differentiate objects in datasets via machine learning is of growing interest. This report details an experimental evaluation of supervised learning on point cloud data using random forest with varying setups. LÄS MER

  4. 3. 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

  5. 4. Offset modeling of shell elements : A study in shell element modeling using Nastran

    Master-uppsats, Linköpings universitet/Mekanik och hållfasthetslära

    Författare :David Klarholm; [2016]
    Nyckelord :Offset shell elements; finite element; Nastran; shell element modeling; Rigid body connection; Rigid links; Kirchhoff shells; Multipoint constraint;

    Sammanfattning : At Saab Aerostructures they are manufacturing a lot of parts for Airbus and Boeing. When these components are investigated using finite element analysis four-node Kirchhoff shell elements and a very fine mesh is often used. LÄS MER

  7. 5. CFD-analysis of buoyancy-driven flow inside a cooling pipe system attached to a reactor pressure vessel

    Master-uppsats, Linköpings universitet/Mekanisk värmeteori och strömningslära; Linköpings universitet/Tekniska högskolan

    Författare :Jens Petersson; [2014]
    Nyckelord :CFD; OpenFOAM; LES; nuclear reactor pressure vessel;

    Sammanfattning : In this work a cooling system connected to a reactor pressure vessel has been studied using the CFD method for the purpose of investigating the strengths and shortcomings of using CFD as a tool in similar fluid flow problems within nuclear power plants. The cooling system is used to transport water of 288K (15°C) into a nuclear reactor vessel filled with water of about 555K (282°C) during certain operating scenarios. LÄS MER