Sökning: "three-dimensional model"

Visar resultat 26 - 30 av 604 avhandlingar innehållade orden three-dimensional model.

1. 26. Three-dimensional numerical modelling for studying smolt migration in regulated rivers

   Författare :Jaan Kiviloog; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : This licentiate thesis considers the numerical modelling of natural river flow for studying the importance of hydraulics on the outmigration of juvenile salmon and trout (smolt). The construction of power plants and dams in Swedish rivers has led to disturbances in the migration of the fish. LÄS MER

3. 27. From Current Collectors to Electrodes : Aluminium Rod Structures for Three-dimensional Li-ion Micro-battery Applications

   Författare :Gabriel Oltean; Kristina Edström; Leif Nyholm; Erik Kelder; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; 3D micro-batteries; aluminium; titanium oxide; current collectros; negative electrodes; electrodepostion; electrophoretic depostion; sol-gel synthesis;

   Sammanfattning : The potential use of 3D aluminium nanorod structures as current collectors and negative electrodes for 3D Li-ion micro-batteries was studied based on the use of relatively simple and cost-effective electrochemical and sol-gel deposition techniques.Aluminium rod structures were synthesised by galvanostatic electrodeposition using commercial porous membranes as templates. LÄS MER

4. 28. Three Dimensional Multiphysics Modeling of Reversible Solid Oxide Electrochemical Cells for Degradation Studies

   Författare :Maria Navasa; Värmeöverföring; []
   Nyckelord :SOCs; SOECs; SOFCs; multiphysics; modeling; three dimensional; transport phenomena; electrochemical reactions; overpotentials; potentials; boundary conditions; validation; experimental data; degradation; carbon deposition; steam; hydrogen; carbon dioxide; carbon monoxide; carbon activity;

   Sammanfattning : Solid oxide electrochemical cells (SOCs) are considered a highly promising technology for providing efficient, sustainable and economic conversion between chemical energy and electrical energy. SOCs can be operated as fuel cells, where electric power is obtained from fossil or non-fossil hydrocarbon fuels depending on the origin or as electrolysis cells, whereby using electrical energy from renewable sources like wind or solar, chemical energy can be stored as fuels. LÄS MER

5. 29. Characterization of catalytic reactions on surfaces from three-dimensional partial pressure distributions

   Författare :Martin Johansson; Bengt Andersson; Linköpings universitet; []
   Nyckelord :;

   Sammanfattning : A chemical reaction taking place on a surface exposed to a viscous gas will give rise to a nonhomogeneous gas composition and temperature in the vicinity of the surface. This is due to the limited rate at which species and heat can be transported in the gas mixture by convection and diffusion. LÄS MER

7. 30. Fully Nonlinear Unsteady Three-Dimensional Boundary Element Method for Ship Motions in Waves

   Författare :Martin Kjellberg; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; BEM; potential flow; MEL; ship motions; free surface; wave resistance; fully nonlinear; time-dependent;

   Sammanfattning : The prediction of the behavior of ships in a seaway has been an important topic in ship design since the beginning of modern naval architecture. In recent years, computer simulations using numerical methods based on mathematical models of the ship hydrodynamics problem has become a valuable tool for researchers and engineers working in this field. LÄS MER