Sökning: "Large Eddy Simulation"

Visar resultat 31 - 35 av 41 uppsatser innehållade orden Large Eddy Simulation.

  1. 31. Analytical and Numerical Study of Thermally Stratified Flow above a forest

    Master-uppsats, Lunds universitet/Institutionen för energivetenskaper

    Författare :Ellinor Hultmark; [2015]
    Nyckelord :forest; thermal stratification; large-eddy simulation; LES; Richardson number; atmospheric boundary layer; wind power; Technology and Engineering;

    Sammanfattning : In order for our energy consumption to be sustainable, we need to rely more and more on renewable energy resources, such as solar power and wind power. In Sweden, 69% of the land area is covered in forest. LÄS MER

  3. 32. A CFD Study Of The Aerodynamic Eects OfPlatooning Trucks

    Master-uppsats, KTH/Mekanik

    Författare :David Norrby; [2014]
    Nyckelord :;

    Sammanfattning : In the present work the aerodynamic forces on trucks driving in so-called platoon are investigated in a numerical fashion. Driving in platoon, or convoy, refers to in an orderly manner driving in a line, one truck after the other, taking advantage of the unrecovered _ow behind each truck. The phenomenon is called slipstreaming or drafting. LÄS MER

  4. 33. Sensitivity Analysis of Near-Wall Turbulence Modeling for Large Eddy Simulation of Incompressible Flows

    Master-uppsats, KTH/Numerisk analys, NA

    Författare :Khan Raqib Mahmud; [2014]
    Nyckelord :;

    Sammanfattning : Wall layer models are very important for the simulation of turbulent flows in complex geometries to characterize the significant flow features. For the simulation of turbulent flows, the performance of Large Eddy Simulation techniques with different wall layer models which we refer to as near-wall turbulence modeling for turbulent flows are analyzed. LÄS MER

  5. 34. Investigation of Scale Adaptive Simulation (SAS) Turbulence Modelling for CFD-Applications

    Master-uppsats, Mekanisk värmeteori och strömningslära; Tekniska högskolan

    Författare :Victoria Wahlbom Hellström; Frida Alenius; [2013]
    Nyckelord :CFD; SAS; Scale Adaptive Simulation; CFD; SAS; Scale Adaptive Simulation; CFD; SAS; Scale Adaptive Simulation; CFD; SAS; Scale Adaptive Simulation;

    Sammanfattning : Fluid dynamics simulations generally require large computational recourses in form of computer power and time. There are different methods for simulating fluid flows that are more or less demanding, but also more or less accurate. Two well known computational methods are the Reynolds Averaged Navier-Stokes (RANS) and Large Eddy Simulation (LES). LÄS MER

  7. 35. Effects of a Forest Clearing: Experimentaland Numerical Assessment

    Master-uppsats, KTH/Mekanik

    Författare :Tetsuya Nakamura; [2013]
    Nyckelord :;

    Sammanfattning : There is a renewed interest in the wind estimate over and around forest areas dueto the increasing demand of wind-energy resources. Many researches have been donewith simplied forest models. LÄS MER