Sökning: "curvature flows"
Visar resultat 1 - 5 av 28 avhandlingar innehållade orden curvature flows.
1. On Some Problems in Systems Biology and Geometric Flows
Sammanfattning : .... LÄS MER
2. Development and analysis of turbulence models for flows with strong curvature and rotation
Sammanfattning : An explicit algebraic Reynolds stress model (EARSM) based ona pressure strain rate model including terms tensoriallynonlinear in the mean velocity gradients is developed in orderto improve predictions for .ows with strong curvature and/orrotation. LÄS MER
3. Simulation methods for hydropower flows : modeling and validation experiments
Sammanfattning : My research project aims for more accurate modeling of the flow in hydropower plants. By accurate modeling, it is possible to try different modifications on existing plants in an affordable manner. Also, entirely new designs can be tested before realization. Hydropower delivers almost 50% of Sweden's electricity demand with a production of 74 TWh. LÄS MER
4. Some non-linear geometric and kinetic evolutions and their approximations
Sammanfattning : This thesis deals with three non-linear evolution problems: mean curvature flow, Willmore flow, and the evolution of solutions to the space homogeneous Boltzmann equation. Generalized mean curvature flows are also considered. A major part of the study focuses on the construction of approximations to these evolutions. LÄS MER
5. Turbulence-resolving Simulations of Swirling Flows
Sammanfattning : A series of numerical investigations is undertaken using a wide range of turbulence mod-els including conventional and non-conventional URANS models, hybrid URANS-LESmethods and LES to capture a large variety of physical mechanisms that produce pres-sure pulsations in the swirling flows. The available knowledge about these pulsations,which are usual in hydropower, are still far from complete. LÄS MER