Sökning: "Low-Reynolds"

Visar resultat 16 - 20 av 42 avhandlingar innehållade ordet Low-Reynolds.

1. 16. Angular dynamics of small particles in fluids

   Författare :Jonas Einarsson; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fluid mechanics; Particle dynamics; Multi-phase flow;

   Sammanfattning : This thesis concerns the angular motion of small particles suspended in fluid flows. A small particle experiences a hydrodynamic torque due to the local fluid velocity, and this torque leads to rotational motion. When inertial effects are negligible the torque on an ellipsoidal particle is given by Jeffery's theory [Jeffery, G. B. LÄS MER

3. 17. Numerical Modelling of Some Engineering Heat Transfer Problems

   Författare :Daniel Eriksson; Värmeöverföring; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energy research; Energiforskning;

   Sammanfattning : Engineering heat transfer problems are very often of a complex nature and most often no analytical solutions exist. One way to create solutions to such problems is to apply numerical methods. This study concerns heat transfer problems with coupled conduction, convection and thermal radiation. LÄS MER

4. 18. A Novel Immersed-Boundary Method for Multiple Moving and Interacting Bodies

   Författare :Andreas Mark; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; fluid-structure interaction; DNS; immersed-boundary method;

   Sammanfattning : This thesis describes the development, implementation and validation of an implicit, second order accurate, finite-volume and instationary immersed-boundary method for simulating the detailed flow around multiple arbitrary moving and interacting bodies. The potential for flows including moving bodies or boundaries, such as multiphase flows still has to be fully realized. LÄS MER

5. 19. Explicit algebraic turbulence modelling in buoyancy-affected shear flows

   Författare :Werner Lazeroms; Arne Johansson; Antti Hellsten; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : Turbulent flows affected by buoyancy forces occur in a large amount of applica-tions, from heat transfer in industrial settings to the effects of stratification inEarth’s atmosphere. The two-way coupling between the Reynolds stresses andthe turbulent heat flux present in these flows poses a challenge in the searchfor an appropriate turbulence model. LÄS MER

7. 20. Eulerian Numerical Study of the Sedimentation of Fibre Suspensions

   Författare :Feng Zhang; Anders Dahlkild; Fredrik Lundell; Staffan Lundström; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fokker-Planck equation; particle fluid flow; suspension; instability;

   Sammanfattning :  Sedimenting suspensions exist in a varity of natural phenomena and industrial applications. It is already observed in experiments that the dilute fibre suspensions experience a hydrodynamics instability under gravity at low Reynolds numbers. Initially well-mixed suspensions become inhomogeneous and anisotropic due to this instability. LÄS MER