Search for dissertations about: "boundary layers"

Showing result 1 - 5 of 164 swedish dissertations containing the words boundary layers.

  1. 1. Simulations of turbulent boundary layers with suction and pressure gradients

    University dissertation from KTH Royal Institute of Technology

    Author : Alexandra Bobke; KTH.; KTH.; KTH.; [2016]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; boundary layers; near-wall turbulence; history effects; asymptotic suction boundary layers; large-eddy simulation;

    Abstract : The focus of the present licentiate thesis is on the effect of suction and pressure gradients on turbulent boundary-layer flows, which are investigated separately through performing numerical simulations.The first part aims at assessing history and development effects on adverse pressure-gradient (APG) turbulent boundary layers (TBL). READ MORE

  2. 2. Receptivity of crossflow-dominated boundary layers

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : David Tempelmann; KTH.; [2011]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Receptivity; three-dimensional boundary layers; optimal growth; adjoint solutions; swept wing;

    Abstract : This thesis deals with receptivity mechanisms of three-dimensional, crossflow-dominated boundary layers. The receptivity of two model problems, a swept-flat-plate and a swept-wing boundary layer, is investigated by solving the parabolised stability equations (PSE) as well as by performing direct numerical simulations (DNS). READ MORE

  3. 3. Boundary layers over wing sections

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Prabal Negi; KTH.; KTH.; KTH.; [2017]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknisk mekanik; Engineering Mechanics;

    Abstract : The understanding of developing boundary layers over wings is an important topic from the perspective of industrial applications. An increased understanding would be consequential not only for achieving higher fuel efficiency but also in the design of aircraft control strategies. READ MORE

  4. 4. Studies of stratocumulus-topped boundary layers using a numerical weather prediction model

    University dissertation from Stockholm : Stockholm University

    Author : Robert Sigg; Stockholms universitet.; [2000]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; meteorologi; Meteorology;

    Abstract : Persistent stratocumulus clouds are commonly observed in many areas on Earth. In general, stratocumulus clouds cool the Earth-atmosphere system due to their influence on the radiation budget. It is therefore essential to describe such clouds accurately in climate and numerical weather prediction models. READ MORE

  5. 5. Stability and Receptivity of Three-Dimensional Boundary Layers

    University dissertation from Stockholm : KTH

    Author : David Tempelmann; KTH.; [2009]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Receptivity; stability; optimal growth; three-dimensional boundary layers; parabolised stability equations; adjoint PSE; crossflow instability; TECHNOLOGY Engineering mechanics Fluid mechanics; TEKNIKVETENSKAP Teknisk mekanik Strömningsmekanik;

    Abstract : The stability and the receptivity of three-dimensional flat plate boundary layers is studied employing parabolised stability equations. These allow for computationally efficient parametric studies. Two different sets of equations are used. READ MORE