Sökning: "multiphase flow"
Visar resultat 11 - 15 av 82 avhandlingar innehållade orden multiphase flow.
11. Experimental studies of large particles in Newtonian and non-Newtonian fluids
Sammanfattning : In everyday human life, laminar flow is arguably an exception whereas turbulent flow is the norm. Yet, the former has been much better understood, naturally since laminar flow renders itself to treatment in a relatively easier fashion compared to turbulence with its chaotic dynamics across multiple scales in space and time. LÄS MER
12. Turbulence modulation effects caused by small droplets using one-dimensional-turbulence
Sammanfattning : This thesis presents a stochastic model to study turbulence modulation effects on gas phases caused by small droplets or more generally speaking particles to achieve a better understanding about the physics and with the aim to provide data for a subgrid-scale (SGS) model for Large-eddy-simulations. The one-dimensional-turbulence (ODT) model addresses one of the major issues for multiphase flow simulations, namely computational costs. LÄS MER
13. Fluid Mechanics of Solid-Liquid Suspensions An Experimental and Numerical Study
Sammanfattning : Multiphase flows are common in many applications in chemical, mineral, biochemical and several other process industries. Examples of equipment in which multiphase flows are encountered are stirred vessels and multiphase jets, in which suspensions are agitated by an impeller in the former case and distributed through a nozzle in the latter. LÄS MER
14. Numerical frameworks for small-scale bubble dynamics
Sammanfattning : Designing efficient bubbly flow systems requires the prediction of the dynamics of the bubbles, the liquid and how the gas and liquid phases interact. Currently, the complex dynamics in bubbly flows are not yet fully explained, and we rely on incomplete models in our numerical methods. LÄS MER
15. Fluid Dynamics and Erosion in a Fluidized Bed for Energy Production. A Numerical and Experimental Study
Sammanfattning : This thesis presents an experimental and a numerical investigation of fluid dynamics and erosion of heat transfer tubes in fluidized beds for energy conversion. The objective is to obtain recommendations for suitable models that can be used to predict the fluid dynamics and material wastage of heat exchanger tubes in fluidized beds. LÄS MER