Sökning: "Low-Reynolds"

Visar resultat 6 - 10 av 42 avhandlingar innehållade ordet Low-Reynolds.

  1. 6. Numerical investigation of swimming micro-organisms in complex environments

    Författare :Lailai Zhu; Luca Brandt; Andrej Vilfan; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hydrodynamic interaction; swimming microorganisms; Low-Reynolds number swimming; stokes flow; squirmer; finite element method; boundary element method; viscoelastic fluid; polymeric flow; microrheology;

    Sammanfattning : .... LÄS MER

  3. 7. Robust Numerical Wall Functions Implemented in OpenFOAM

    Författare :Jon-Anders Bäckar; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; impinging jet; numerical wall function; Computational Fluid Dynamics; speed-up; OpenFOAM;

    Sammanfattning : This thesis presents two new numerical wall models for computing Reynolds-Averaged-Navier-Stokes (RANS) equations with low-Reynolds-number turbulence models. Theobjective is to considerably reduce the total central processing unit (CPU) cost of thenumerical simulations of wall bounded flows while maintaining the accuracy of anylow-Reynolds-number turbulence model. LÄS MER

  4. 8. Control and estimation of wall bounded flow systems

    Författare :Jerome Hoepffner; KTH; []
    Nyckelord :;

    Sammanfattning : This thesis focuses on the application of linear feedback control and estimation to channel flow. Both the initial stage of the transition and the low Reynolds number turbulent cases are studied. From sensors at the wall, the state of the flow is estimated, using a stochastic description of the flow disturbances. LÄS MER

  5. 9. Turbulence Modelling for Internal Cooling of Gas-Turbine Blades

    Författare :Jonas Bredberg; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Numerical simulations of geometrical configurations similar to those present in the internal cooling ducts within gas turbine blades have been performed. The flow within these channels are characterized by heat transfer enhancement ribs, sharp bends, rotation and buoyancy effects. LÄS MER

  7. 10. Development of Numerical Methods for Turbulent Flow in Complex Rotating Systems

    Författare :Peter Hedberg; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; fluid mechanics; computer code; rotating geometries; turbomachinery;

    Sammanfattning : A computer code has been developed to predict three-dimensional incompressible turbulent flow in complex rotating geometries. The application in mind is turbomachinery in general. However such a code is able to treat a large number of problems in fluid mechanics. LÄS MER