Sökning: "turbulent kinetic energy"

Visar resultat 1 - 5 av 23 uppsatser innehållade orden turbulent kinetic energy.

  1. 1. Computational Fluid Dynamics of the flow in a diffuser : - like geometry

    Kandidat-uppsats, KTH/Skolan för teknikvetenskap (SCI)

    Författare :Rasmus Johansson Oskarsson; [2023]
    Nyckelord :Fluid mechanics; Flow simulation; RANS; Flow separation; Diffuser;

    Sammanfattning : Simulations were performed to investigate flow separation of an asymmetricdiffuser - like geometry. The geometry used for the simulations was modeledafter an experimental setup with recorded flow data, which was compared tothe simulated data. For all simulations, steady state flow at the inlet was usedwith the assumption of a 2D flow. LÄS MER

  3. 2. Rocket Jet Impinging on a Surface

    Master-uppsats, KTH/Teknisk mekanik

    Författare :Javier Capel Jorquera; [2022]
    Nyckelord :Rocket jet impinging on a surface; Favre-Averaged Equations; turbulence modeling; numerical considerations; Method of Characteristics; MOC; plate optimization;

    Sammanfattning : With the continuous growth of the space industry and the introduction of reusable rockets, the number of rocket launches is expected to increase significantly in the following years. During rocket launching, the engine exhaust impinges on the launch structure producing a complex flow field. LÄS MER

  4. 3. Design of compact automotive heat exchanger, analysing the effects of RANS models and utilising Additive Manufacturing

    Kandidat-uppsats, KTH/Fysik

    Författare :Nikhil Srikkanth; Bartosz Brzuchalski; [2022]
    Nyckelord :Turbulence; Reynolds Averaged Navier-Stokes; KTH Formula Student; metal additive manufacturing; CFD; turbulent kinetic energy; boundary layer;

    Sammanfattning : The analytical modelling of complex turbulent airflow remains one of the great unsolved mysteries of physics, but in this paper two widely used Reynolds Averaged Navier-Stokes models (k-$\epsilon$ and k-$\omega$ SST) are compared while designing a heat exchanger for the KTH Formula Student electric race car. CAD software was used to design lattices for the heat exchanger core and theorise about how to increase heat transfer while also taking into account the utilisation of metal additive manufacturing. LÄS MER

  5. 4. Study of a vertical slot fish ladder : Evaluation of flow dynamics through a standardized bypass and the effect of predesigned roughness elements

    Magister-uppsats, Högskolan i Gävle/Avdelningen för byggnadsteknik, energisystem och miljövetenskap

    Författare :Iñigo Revilla; Laia Pons; [2020]
    Nyckelord :Vertical slot fishway; roughness element; pattern; slope; velocity; turbulence; Fluent;

    Sammanfattning : Migrating freshwater fish population has been significantly declined, mostly by the obstruction of their migratory routes by hydropower dams. To diminish such impacts, fish ladders have been developed to facilitate the passage of migrating fish. LÄS MER

  7. 5. Interscale transport of Reynolds stresses in wall-bounded flows

    Master-uppsats, KTH/Skolan för teknikvetenskap (SCI)

    Författare :Gioele Ferrante; Andres Morfin; [2019]
    Nyckelord :Reynolds Stress; Zero-Pressure Gradient Turbulent Boundary Layer; Turbulent Couette Flow; Inverse Interscale Transport; Energy Cascase; Wall-bounded Flows; Direct Numerical Simulation; Large Eddy Simulation.;

    Sammanfattning : Couette, pipe, channel, and zero-pressure gradient (ZPG) turbulent boundary layer (TBL) flows have classically been considered as canonical wall-bounded turbulent flows since their near-wall behavior is generally considered to be universal, i.e. invariant of the flow case and the Reynolds number. LÄS MER