Sökning: "Receptivity"

Visar resultat 1 - 5 av 38 avhandlingar innehållade ordet Receptivity.

  1. 1. Receptivity of crossflow-dominated boundary layers

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

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

    Sammanfattning : 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). LÄS MER

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

    Detta är en avhandling från Stockholm : KTH

    Författare :David Tempelmann; KTH.; [2009]
    Nyckelord :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;

    Sammanfattning : 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. LÄS MER

  3. 3. On stability and receptivity of boundary-layer flows

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Nima Shahriari; KTH.; KTH.; KTH.; [2016]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; boundary layer receptivity; acoustic receptivity; swept-wing flow; crossflow vortices; roughness element; global stability analysis; direct numerical simulation; plasma actuator; Teknisk mekanik; Engineering Mechanics;

    Sammanfattning : This work is concerned with stability and receptivity analysis as well as studies on control of the laminar-turbulent transition in boundary-layer flows through direct numerical simulations. Various flow configurations are considered to address flow around straight and swept wings. LÄS MER

  4. 4. The Human Endometrium Studies on Angiogenesis and Endometriosis

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Christian Moberg; Uppsala universitet.; [2017]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; endometrium; angiogenesis; endothelial cell; endometriosis; receptivity; implantation; oestrogen receptor; progesterone receptor; crystallin; interleukin; vasoactive intestinal peptide; peritoneal fluid; Obstetrik och gynekologi; Obstetrics and Gynaecology;

    Sammanfattning : Angiogenesis is thought to play a pivotal role in the cycling endometrium. Coordinated by oestrogen and progesterone, endometrial blood vessel development is primarily mediated by vascular endothelial growth factor-A (VEGF-A), which promotes endothelial cell (EC) proliferation and protects ECs from induced apoptosis. LÄS MER

  5. 5. Study of generation, growth and breakdown of streamwise streaks in a Blasius boundary layer

    Detta är en avhandling från Stockholm : Mekanik

    Författare :Luca Brandt; KTH.; [2001]
    Nyckelord :Fluid mechanics; laminar-turbulent transition; boundary layer flow; transient growth; streamwise streaks; lift-up effect; receptivity; free-stream turbulence; streak instability; secondary instability; Direct Numerical Simulation.;

    Sammanfattning : Transition from laminar to turbulent flow has beentraditionally studied in terms of exponentially growingeigensolutions to the linearized disturbance equations.However, experimental findings show that transition may occuralso for parameters combinations such that these eigensolutionsare damped. LÄS MER