Sökning: "boundary layer"

Visar resultat 1 - 5 av 382 avhandlingar innehållade orden boundary layer.

  1. 1. Boundary Layer : Approximate Approximations and Cubature of Potentials in Domains

    Detta är en avhandling från Linköping : Linköping university

    Författare :Tjavdar Ivanov; [1995]
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  2. 2. Optimisation and control of boundary layer flows

    Detta är en avhandling från Stockholm : KTH

    Författare :Antonios Monokrousos; KTH.; [2009]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; boundary layer; control; estimation; optimal disturbances; Lagrange method; TECHNOLOGY Engineering mechanics; TEKNIKVETENSKAP Teknisk mekanik;

    Sammanfattning : Both optimal disturbances and optimal control are studied by means of numerical simulations for the case of the flat-plate boundary-layer flow. The optimisation method is the Lagrange multiplier technique where the objective function is the kinetic energy of the flow perturbations and the constraints involve the linearised Navier–Stokes equations. LÄS MER

  3. 3. On the Arctic Boundary Layer From Turbulence to Climate

    Detta är en avhandling från Stockholm : Meteorologiska institutionen (MISU)

    Författare :Thorsten Mauritsen; Stockholms universitet.; [2007]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Atmospheric boundary layers; Turbulence; Stable stratification; Gravity waves; Mesoscale motion; Arctic climate; NATURAL SCIENCES Earth sciences Atmosphere and hydrosphere sciences Meteorology; NATURVETENSKAP Geovetenskap Atmosfärs- och hydrosfärsvetenskap Meteorologi; atmosfärvetenskap; Atmospheric Sciences;

    Sammanfattning : The boundary layer is the part of the atmosphere that is in direct contact with the ground via turbulent motion. At mid-latitudes the boundary layer is usually one or a few kilometers deep, while in the Arctic it is much more shallow, typically a few hundred meters or less. LÄS MER

  4. 4. Optimal Control of Boundary Layer Transition

    Detta är en avhandling från Stockholm : Mekanik

    Författare :Markus Högberg; KTH.; [2001]
    Nyckelord :laminar-turbulent transition; transition control; turbulence control; flow control; boundary layer flow; channel flow; optimal control; adjoint equations; Riccati equations; Orr--Sommerfeld--Squire equations; secondary instability; transient gro;

    Sammanfattning : .... LÄS MER

  5. 5. Receptivity of Boundary-Layer Flows over Flat and Curved Walls

    Detta är en avhandling från Stockholm : KTH

    Författare :Lars-Uve Schrader; KTH.; [2010]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Boundary-layer receptivity; laminar-turbulent transition; swept-plate boundary layer; Görtler flow; leading-edge effects; swept-wing flow; crossflow vortices; Görtler rolls; disturbance streaks; wall roughness; free-stream turbulence; TECHNOLOGY Engineering mechanics Fluid mechanics; TEKNIKVETENSKAP Teknisk mekanik Strömningsmekanik;

    Sammanfattning : Direct numerical simulations of the receptivity and instability of boundary layers on flat and curved surfaces are herein reported. Various flow models are considered with the aim to capture aspects of flows over straight and swept wings such as wall curvature, pressure variations, leading-edge effects, streamline curvature and crossflow. LÄS MER