Sökning: "Zero-Pressure Gradient Turbulent Boundary Layer"

Hittade 4 uppsatser innehållade orden Zero-Pressure Gradient Turbulent Boundary Layer.

  1. 1. Deep learning for non-intrusive sensing in turbulence with passive scalars

    Master-uppsats, KTH/Strömningsmekanik och Teknisk Akustik

    Författare :Arivazhagan Geetha Balasubramanian; [2021]
    Nyckelord :Turbulent boundary layer; passive scalar; direct numerical simulation; Prandtl number; Machine learning; convolutional neural network; Turbulent gränsskikt; passiv skalär; direkt numerisk simulering; Prandtl-nummer; maskininlärning; faltningsneurala nätverk;

    Sammanfattning : The near-wall modelling of turbulent flows has been an active field of research due to the computational cost associated with the direct numerical simulations of such flow, which are characterized by a wide range of length and time scales. With the recent advancements in technological capabilities, the availability of high-fidelity data has enabled the construction of data-driven approaches to model turbulence. LÄS MER

  3. 2. Development and validation of an improved wall-function boundary condition for computational aerodynamics

    Master-uppsats, KTH/Strömningsmekanik och Teknisk Akustik

    Författare :Carlo Loris Palombo; [2021]
    Nyckelord :Wall Functions; Wall Treatment; M-Edge; Computational Fluid Dynamics; Turbulent Boundary Layer; Turbulence Models; Väggfunktionsranvillkor; M-Edge; Strömningsmekaniska beräkningar; Turbulent Gränsskikt; Turbulensmodeller;

    Sammanfattning : Computational Fluid Dynamics is a powerful and widely used tool for developing projectsthat concern flow motion, in very different fields. Industrial CFD solvers are continuouslydeveloped with the aim of improving accuracy and reducing the computational cost of thesimulations. LÄS MER

  4. 3. 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

  5. 4. Robust optimisation of the pressure-gradient distribution in turbulent boundary layers

    Master-uppsats, KTH/Mekanik

    Författare :Yuki Morita; [2019]
    Nyckelord :;

    Sammanfattning : In order to better characterise pressure-gradient turbulent boundary layers (TBLs), and to advance the theory of these flows, typically canonical conditions are required. This is achieved by keeping the Clauser pressure-gradient parameter, β, constant along the streamwise direction, see for instance Mellor and Gibson [9] and Bobke et al. LÄS MER