Sökning: "physical condition"

Visar resultat 11 - 15 av 436 avhandlingar innehållade orden physical condition.

1. 11. Large Eddy Simulation of the Flow around a High-Lift Airfoil

   Författare :Simon Dahlström; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; mildly separation; hybrid RANS LES; incompressible finite volume; airfoil; transition; large Eddy simulation; approximate wall boundary condition;

   Sammanfattning : The work presented in this thesis concerns the efforts of conducting a Large Eddy Simulation (LES) around an airfoil. The airfoil is close to stall, near maximum lift and the Reynolds number is high. In the flow a transitional separation bubble is present. LÄS MER

3. 12. Theoretical and experimental studies of the flux-flow type Josephson oscillator

   Författare :Yongming Zhang; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nb NbOx PbBi tunnel junction; resistive loading; effect of self-field; resonant fluxion motion; velocity-matching step; chaotic phenomena; SIS detector; optimum bias feed; uniform bias feed; open-circuit boundary condition; perturbed sine-Gordon qeuation; reactive ion beam oxidation; effect of damping; one dimensional Josephson junction; flux-flow type Josephson oscillator;

   Sammanfattning : .... LÄS MER

4. 13. Fast Particle Driven Instabilities in Tokamak Plasmas

   Författare :Robert Nyqvist; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : The burning plasmas of the next generation tokamak fusion experiment ITERwill contain signicant populations of highly energetic ions. Both fusion gener-ated alpha particles and fast ions accelerated by auxiliary heating schemes arecapable of exciting instabilities in the Alfven frequency range, which may inturn cause redistribution of energetic particles and lead to deleterious eventssuch as e. LÄS MER

5. 14. Causes and Perceptions of Environmental Change in the Mangroves of Rufiji Delta, Tanzania : Implications for Sustainable Livelihood and Conservation

   Författare :Simon Mwansasu; Lars-Ove Westerberg; Annika Dahlberg; Ian Brown; Ian Bryceson; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physical Geography; naturgeografi;

   Sammanfattning : Mangroves are ecosystems with enormous ecological importance, supporting both terrestrial and marine food webs. They provide ecosystem services (e.g. food, medicines, fuel, constructing material) to communities near and far. LÄS MER

7. 15. Basal boundary conditions, stability and verification in glaciological numerical models

   Författare :Christian Helanow; Peter Jansson; Brian Hanson; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Glaciology; subglacial hydrology; ice sheet modeling; basal boundary conditions; non-linear Stokes flow; Physical Geography; naturgeografi;

   Sammanfattning : To increase our understanding of how ice sheets and glaciers interact with the climate system, numerical models have become an indispensable tool. However, the complexity of these systems and the natural limitation in computational power is reflected in the simplifications of the represented processes and the spatial and temporal resolution of the models. LÄS MER