Sökning: "flow characteristic"

Visar resultat 6 - 10 av 74 uppsatser innehållade orden flow characteristic.

  1. 6. Evaluation of a stochastic model of coherent turbulent structures for atmospheric particle deposition applications

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Luft-, vatten- och landskapslära

    Författare :Andreas Eriksson; [2022]
    Nyckelord :atmospheric dispersion; particle deposition; k-epsilon; RANS; lagrangian particle model; stochastic particle model; OpenFOAM; SIMPLE algorithm; ABL; atmospheric boundary layer; neutral boundary layer; coherent turbulent structures;

    Sammanfattning : In this thesis, we have evaluated a stochastic Lagrangian model for computing particle deposition rates with prospects to use for atmospheric deposition applications.  The model is one-dimensional and models the particle dynamics in the boundary layers near walls and obstacles by simulating the coherent turbulent structures and Brownian motion governing the wall-normal transport. LÄS MER

  3. 7. Treatment and using of greywater in sorting wastewater system as a resource

    Master-uppsats, KTH/Kemiteknik

    Författare :Maza Seyuom Seifu; [2022]
    Nyckelord :Greywater; heat recovery; physical treatment; chemical treatment; biological treatment; Gråvatten; värmeåtervinning; fysikalisk behandling; kemisk behandling; biologisk behandling;

    Sammanfattning : Det här projektet redogör för olika behandlingstekniker för gråvatten och för tillämpningar för olika ändamål inom återanvändning. Syftet är att föreslå en lämplig processdesign för behandling av gråvatten i stadsmiljö, på Loudden, Norra Djurgårdsstaden (NDS). LÄS MER

  4. 8. Population genetic analyses inform conservation of the endangered Clouded Apollo (Parnassius mnemosyne) butterfly in Sweden

    Master-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning

    Författare :Veronika Mrazek; [2022]
    Nyckelord :Clouded apollo; Parnassius mnemosyne; Lepidoptera; Genetic diversity; Differentiation; Inbreeding; Demographic history; Gene-flow;

    Sammanfattning : The clouded apollo (Parnassius mnemosyne) is a palearctic butterfly with a wide distribution across Eurasia. In recent decades, however, the species has declined in many parts of its distribution range. LÄS MER

  5. 9. LES modelling of spray combustion

    Master-uppsats, Lunds universitet/Institutionen för energivetenskaper

    Författare :Arvid Åkerblom; [2021]
    Nyckelord :Gas Turbine; CFD; Large Eddy Simulation; Lagrangian Particle Tracking; Chemical Kinetics; Reaction Mechanism; Combustion; OpenFOAM; CHEMKIN; Technology and Engineering;

    Sammanfattning : Computational fluid dynamics is a powerful method for understanding the flow and combustion that occurs inside aircraft engines and will be a key tool in the transition from conventional fossil-based fuel to sustainable alternatives. Because conventional fuels have been more widely researched, an attempt at simulating the combustion of alternative fuels should be preceded by the development of a method that is capable of accurately simulating the combustion of a conventional fuel. LÄS MER

  7. 10. Improvement and Development of Powder Spreadability Testing

    Master-uppsats, KTH/Materialvetenskap

    Författare :Fabrice Rosala; [2021]
    Nyckelord :;

    Sammanfattning : With rising interest in metal additive manufacturing and, specifically, in powder bed fusion processes, it is essential to understand relevant process parameters and the behavior of powders used in such processes. At the time of writing, the flow behavior of powders is in the spotlight whereas little research into the spreadability of a powder is being conducted. LÄS MER