Parametric analysis of a double shaft batch-type paddle mixer: A DEM study

The Discrete Element Method (DEM) in combination with an One Factor At a Time (OFAT) experimental simulation plan were employed to investigate the effect of a selection of factors on the mixing performance of a double shaft, batch-type paddle mixer. Most influential factors on the mixing performance of the paddle mixer are desired for...

Lake and reservoir volume variability from satellite imagery data: An assessment of the usability of high-resolution digital elevation models to extract water levels

Recent research suggested that the digital elevation models can be considered, as an alternative to the altimetry data. However, the water prohibits the ability of monitoring the construction the waterbed, due to the loss of the returning signal. The elevation models have therefore a flat surface, which prohibits the extraction of the water...

Hybrid grab concepts for varying operational conditions

Design of grabs under operational conditions (abstract)

Bulk materials such as iron ore transported by bulk carriers are commonly unloaded by the use of grabs. The unloading process is time consuming and increasing the unloading capacity is of big importance for terminals. A validated co-simulation developed by the TU Delft in cooperation with Nemag enables to test grabs in the virtual environment....

Numerical modelling of underwater sand cutting process

To realize sustainable development, offshore wind energy has been a highly valuable solution to meet the demand for renewable energy. Accompanied with the construction of the offshore wind turbines, cable casting and the following cable trenching process in the underwater condition are necessarily required. The research on the underwater sand...

Systematic Design Optimization of grabs handling cohesive bulk materials: Systematisch ontwerp optimalisatie van overslag grijpers voor cohesive bulk materialen

Grabs are often used for unloading bulk carriers that transport iron ore cargoes around the globe. The unloading process is time-consuming, and terminals strive to maximise their turnover capacity. Grab performance is a combination of maximum crane capacity, grab design and bulk material behaviour. Due to bulk uncertainties occurred by varying...

Oscillating Disc Technology for Rock Excavation: DEM for non-linear rock cutting tools

Rock cutting is a challenging process. Heavy equipment, large cutting forces, high wear rates and large amounts of required energy are common challenges when cutting rock. Traditionally, rock cutting is based on a linear motion of the cutting tool. However, a significant improvement on the cutting performance is expected when using non-linear...

Automatic generation of raster-based height data for the Netherlands based on the AHN2 data set

The recent emergence of Light Detection And Ranging (LiDAR) scanning technology has resulted in the availability of very large three dimensional point cloud data sets. These LiDAR data sets have become a main source for the modeling and reconstruction of both ground surface as well as above-ground objects such as buildings and vegetation. For...

World Hydropower Capacity Evaluation

A continuous population growth and increasing energy demand combined with depleting traditional energy reserves puts a pressure on conventional methods of electricity generation. The desire and ambition to create a more sustainable society paves the way for the ‘renewables’. Hydropower or Hydroelectricity already plays a significant role in...

Monitoring Glacier Elevation Changes over the Tibetan Plateau Using ALOS PRISM and ICESat

Glacier melting has become a key issue in the current discussion on global climate change. Glaciers of the Tibetan Plateau may be heavily affected by global warming. Hence, possible glacier melting over the plateau attracts the most attention. Possible glacier melting is evaluated via studies on mass balance of the glaciers. Glacier elevation...

Discrete Element Modelling: The influence of High Hydrostatic Pressure on the Cutting Processes of Hard Rock

Seafloor Massive Sulfide (SMS) contains high levels of metals such as copper and gold. Water depths of 2000 up to 3000 meter make mining of SMS a challenge. Despite this, mining industry encourages research into feasible extraction methods of SMS, pushed by the high metal prices nowadays. This research focuses on the influence of hydrostatic...

Aerostat Photogrammetry for Large Scale Hydrological Modeling with Special Focus on Energy Balance Terms

Knowledge of temperature distributions on streams and lakes is considered to be a valuable source of information for a wide range of disciplines such as ecologists, hydrologists and geochemists, as it can provide insights into the dynamics of these water bodies (Westhoff, 2006). Modeling of surface water temperature on the other hand is a...