Sökning: "Stokes system"
Visar resultat 1 - 5 av 88 avhandlingar innehållade orden Stokes system.
1. Accuracy, efficiency and robustness for rigid particle simulations in Stokes flow
Sammanfattning : The thesis concerns simulation techniques for systems of nano- to micro-scaled rigid particles immersed in a viscous fluid, ubiquitous in nature and industry. With negligible fluid inertia, the set of PDEs known as the Stokes equations can be used to model the hydrodynamics. LÄS MER
2. Methods for analysis of 3D movement of the trunk during treadmill locomotion
Sammanfattning : Human locomotion is a common activity and although much progress has been made in the analysis and modeling of movement, we still have a rather limited understanding of the basic mechanisms of normal locomotion. A full understanding requires the integration of the underlying neural mechanisms with the 3D dynamics (kinetics + kinematics) of locomotion. LÄS MER
3. Estimating Human Limb Motion Using Skin Texture and Particle Filtering
Sammanfattning : Estimating human motion is the topic of this thesis. We are interested in accurately estimating the motion of a human body using only video images capturing the subject in motion. Video images from up to two cameras are considered.The first main topic of the thesis is to investigate a new type of input data. LÄS MER
4. Introducing Surface Gravity Waves into Earth System Models
Sammanfattning : Surface gravity waves alter the turbulence of the bottom atmosphere and the upper ocean. Accordingly, they can affect momentum flux, heat fluxes, gas exchange and atmospheric mixing. However, in most state-of-the-art Earth System Models (ESMs), surface wave influences are not fully considered or even included. LÄS MER
5. Frequency Domain Linearized Navier-Stokes Equations Methodology for Aero-Acoustic and Thermoacoustic Simulations
Sammanfattning : The first part of the thesis focuses on developing a numerical methodology to simulate the acoustic properties of a hybrid liner consisting of a perforated plate, a porous layer and a Helmholtz cavity. Liners are always a standard way to reduce noise in today’s aeroengines, e.g. LÄS MER