Oblique Particle-Wall Collisions in a Viscous Fluid

Interaction of particles in a viscous fluid with a wall and with other particles is often observed in phenomena like sedimentation, erosion and filtration processes. With the increasing computational power there is now the possibility of simulating such particle-laden flows from a micro-scale perspective by direct application of no-slip/no...

Laboratory experiments recreating icy moons' geysers

This study is part of an ongoing research project, which aims to increase the physical understanding of the plume formation on Saturn’s icy moon Enceladus. The experimental setup presented in this study is the third iteration of the physical models aiming to recreate the main plume characteristics, where in this study the effects of the channel...

Development of a numerical evaluation strategy for predicting crack branching and crack turning in the latest generation aluminium alloys

Artificially aged aluminium-lithium alloys have recently seen renewed interest in them in the aviation industry. They have a decreased density, while keeping or improving the fatigue properties compared to other aluminium alloys. Research shows that these aluminium-lithium and other advanced aluminium alloys exhibit crack turning and crack....

Fatigue Crack Growth in Solid Round Metallic Bars with a Shoulder Fillet

Solid round bars with a shoulder fillet are frequently used in engineering structures because it facilitates a smooth transition in thickness. However, the presence of shoulder fillets is currently neglected in the prediction of fatigue crack growth in engineering practice. Since stress concentrating locations like a shoulder fillet can have a...

Continuous Membrane-assisted Airlift Crystallization

In previous research, batch experiments with an airlift crystallizer on ammonium sulphate, adipic acid and L-ascorbic acid have shown significant reduction of secondary nucleation compared to conventional stirred crystallizers. Furthermore, the crystal size distribution (CSD) achieved by the airlift crystallizer is almost 60% narrower than the...

Injection and Evaporation of 100% methanol: Experimental and simulation-based research into the injection and evaporation of 100% methanol for use in a port-injected spark-ignited ICE

The maritime sector faces major challenges to reduce its impact on global warming. The use of methanol as a fuel alternative is considered one of the more promising options to be implemented in a relatively short to medium time frame; based on the potential availability, emission reduction, energy density, potential to be synthetically produced,...

Experimental and simulation-based investigation of the performance of a 100 % methanol port-injected spark-ignited engine

The maritime sector faces major challenges with increasing regulations from the International Maritime Organization (IMO) and national regulations for CO2, SOx and NOx. Innovative fuel types for maritime use are now under development by various stakeholders. Methanol shows considerable potential as one of the most promising for implementation in...

Sea ice subjected to cyclic compression: Laboratory experiments and a dislocation based model

Wave or vehicular action on an ice sheet as well as structural vibrations and thermally induced loading cause cyclic loading on an ice sheet. To better understand the effects of cyclic loading on the strength of sea ice, cyclic loading tests have been conducted at the University Centre in Svalbard (UNIS). In addition, the corresponding ice...

Structural behavior of pressure locked gratings

Pressure locked gratings have many uses, both on land and at sea. This is mainly due to the high degree of flexibility in dimensions and load bearing capacity. Despite the many uses in our surroundings, the term pressure locked grating is unknown to many. This term refers to the way in which the most important connection in pressure locked...

Acoustic coagulation of aerosols

Flue gas from combustion or syngas from gasification can contain fine particles, so called aerosols. These can be potentially harmful for downstream equipment or if emitted to the atmosphere, be inhaled by humans and cause respiratory problems. Standard practice to mitigate this is to use a cyclone which has a low filtration efficiency for sub...