Finite Element Simulation of the In - Situ AFP process for Thermoplastic Composites using Abaqus

Series Hybrid Electric Aircraft: Comparing the Well-to-Propeller Efficiency With a Conventional Propeller Aircraft

THE aviation industry is responsible for 12% of the total transportation impact of CO2 while awareness, for decreasing the total carbon footprint, is rising. Both the aerospace and the automotive industry are facing an increasing pressure from society to make the transportation sector more sustainable. Within the automotive industry slowly an...

Thermally destratifying lakes against blue algae with rising air bubbles

Mixing systems are used in deep lakes to prevent blue algae from rapidly growing. Air bubbles rise from the bed, dragging water from below upwards. The resulting vertical circulation suppresses blue algae growth. However, these systems demand electricity of about €25,000 per km2 per year. The airlift promises to mix the water more efficiently,...

Analyses and dynamic modelling of the compressor section in a PCC-process for coal-fired power plants with offshore storage

Carbon dioxide (CO2) is one of the main greenhouse gases that contributes to the current climate change. Its increasing share in the Earth atmosphere leads to an increase in global temperature. To prevent the sea level from rising and increased severity of extreme weather, many governments are now trying to reduce their carbon footprint. One...

Modelling sediment transport and morphology during overwash and breaching events

Currently, morphodynamic models as XBeach show substantial overestimations of the erosion rates during breaching and overwash events at barrier islands. The presently used limitations on the Shields parameter and the sediment concentration do hinder erosion, but have undesirable side effects, e.g. the breaching process is suppressed. By...

Modelling Of Multistable Shells, A Differential Geometry Based Approach

Shells are thin-walled curved structures that have great potential for multistability. However, there does not yet exist a general model that can be used to predict the stable equilibria of an arbitrary shell; this model would have to capture the complex interplay of (initial) geometry, material parameters and (local) prestress. In this thesis...

Modelling CO2 Foam Displacements for Enhanced Oil Recovery

Increasing demand for oil in the near future implies the need for Enhanced Oil Recovery (EOR) methods to produce the remaining oil after primary and secondary production. Miscible gas injection has an excellent microscopic sweep efficiency; however due to density difference, high gas mobility and reservoir heterogeneity, the macroscopic sweep...

Modelling optical properties of layers for thin-films silicon solar cells

In the research on solar cells, accurate characterization techniques are of great importance. In this work a specific technique is studied that makes use of transmitted and reflected light from a thin layer. The material properties of transparent conductive oxides (TCOs), silicon and nanoparticles are extracted by fitting a mathematical model on...