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X-ray tomography for fully-3D time-resolved reconstruction of bubbling fluidized beds

Graas, Adriaan B.M. (author), Wagner, E.C. (author), van Leeuwen, Tristan (author), van Ommen, J.R. (author), Batenburg, K. Joost (author), Lucka, Felix (author), Portela, L. (author)

A new X-ray computed tomography technique for the purpose of imaging fluidized beds is presented. It consists of an experimental set-up with three stationary X-ray source and flat panel detector pairs, a geometric calibration and data processing workflow, and an image reconstruction algorithm. The technique enables sparse-angular tomographic...

journal article 2024

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Numerical investigation of the equipment set-up in triaxial testing of soft soils

Chao, C. (author), Jommi, C. (author), Muraro, S. (author)

Element testing of soft soils is challenging due to the large strains attained in the pre-failure range. Besides the heterogeneity of natural samples, the set-up configuration is the main driving factor for non-homogenous response. Stress, strain and pore pressure non-uniformities induced by the loading system affect the observed behaviour and...

conference paper 2023

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Sensitivity analysis for buckling characterisation using the vibration correlation technique

Baciu, Theodor D. (author), Degenhardt, Richard (author), Franzoni, Felipe (author), Gliszczynski, Adrian (author), Arbelo, Mariano A. (author), Castro, Saullo G.P. (author), Kalnins, Kaspars (author)

The Vibration Correlation Technique (VCT) is a non-destructive method to predict buckling loads for imperfection-sensitive structures. While successfully used to validate numerical models and predict experimental buckling loads, recommendations for defining the VCT experiment are scarce. Here, its sensitivity towards the number of load steps...

journal article 2023

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Performance of steel open ended pile driveability prediction methods in dense sand: Evaluating pile driveability models and improving driveability predictions of a recent static axial capacity approach

ARGYROULIS, KONSTANTINOS (author)

Inefficient installation of pile foundations may lead to high risks of material damage, inadequate pile capacity, and time delays that can have significant financial implications to any kind of project, both onshore and offshore. Therefore, there is high demand for a comprehensive driveability analysis that considers key aspects of the...

master thesis 2022

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Homogeneous detached composite breakwater: CFD study of the design sensitivities in the 2D geometrical layout using a detached homogeneous low-crested structure to reduce sea wall overtopping

Jonker, Ruben (author)

In this research OpenFOAM is used to model and determine the complex hydrodynamic behaviour of a Homogeneous low-crested structure (HLCS) consisting of cubipod artificial concrete elements. The validated model is used to gain insight in the design sensitivities of a two dimensional cross sectional layout to reduce sea wall overtopping. HLCS and...

master thesis 2020

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Validation of aero-hydro-servo-elastic load and motion simulations in BHawC/OrcaFlex for the Hywind Scotland floating offshore wind farm

Bussemakers, Matthijs (author)

Climate change, as a result from global warming, requires an energy transition: the reduction of greenhouse gas emissions from fossil fuels and a radical innovation of the global energy system to proceed apace. Offshore wind is an important source of clean, renewable energy, and it plays a key role in the transition. 80% of the worldwide...

master thesis 2020

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Production Biospheres: A new production space in Hembrug

Pol, Lucas (author)

The project named production biospheres created a process design aimed on the adaptive reuse of the Plots In The Woods site on the Hembrug terrain near Zaandam. The landscape and urban design for the site is based on methods used by landscape architects and ecologists based on the three terms cultivate, stage and set up, not just creating. The...

master thesis 2020

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Design and fabrication of a measurement interface for smart IoT sensors: Signal generation and hardware control

Geel, Patrick (author), Kleijweg, Zep (author)

This project is to design and implement a reconfigurable measurement interface for Internet of Things sensors, for the Microelectronics Department of the Delft University of Technology. This thesis will discuss the functionality and design process taken in designing such a reconfigurable measurement interface, focusing on generating signals and...

bachelor thesis 2019

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Designing a test set-up to measure electrosurgical parameters: In Search of Design Requirements for an Electrosurgical Unit for Low-and-Middle Income Countries

van Dam, Anne (author)

Safe surgical and anesthetic care is not available to 5 billion people worldwide. Many problems that are encountered when providing surgical care are related to surgical equipment. A lot of surgical equipment is designed for the use in High-Income Countries (HICs) and not specifically for Low-and-Middle Income countries (LMICs). One appliance,...

master thesis 2018

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Technical feasibility of a quick bridge replacement strategy with minimal traffic hindrance: On the retainment of existing foundations and the application of Advanced Cementitious Materials in an Accelerated Bridge Construction method

Stap, Merijn (author)

Bridges are a crucial part of the dense Dutch highway network. Almost 50% of the current bridges are built between 1960 and 1980 for an intended service life of 50 years and thus they might reach the end of their lifetime in the near future. This strongly indicates that a large challenge can be expected regarding infrastructural replacement.<br/...

master thesis 2017

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Time-Dependent Capacity of Driven Displacement Piles in Sand

Beutick, Erik (author)

A time-dependent capacity increase has often been observed for driven displacement piles in sand. Long-term bearing capacity increase after dissipation of excess pore water pressure is referred to as set-up. Significant increases in axial capacity have been reported where the rate of set-up varied between 15 and 75% per log cycle of time. <br/>...

master thesis 2017

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Accuracy wind set-up formula for irregularly shaped lakes with a strong varying water depth

Van Rinsum, G.P. (author)

This document includes a survey whether the wind set-up formula is valid and accurate in case of irregularly shaped lakes with a strong varying water depth. The formula is designed for a pure theoretical situation, the question is whether the formula is valid in situations that differ a lot from the theoretical one. The research is carried out...

bachelor thesis 2015

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Reliability-Based Design and Quality Control of Bored Piles

Bach, D. (author)

Bored piles are a type of deep foundations which have been and are being widely used in construction engineering such as high-rise buildings, bridges, jetties, and so on. Although bored piles have remarkable advantages over driven piles, the quality of bored piles is frequently affected by many causes of imperfection, which mainly come from the...

doctoral thesis 2014

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Sediment transport in a fringing reef environment: Analysis using laboratory experiments and numerical modelling

Bodde, W.P. (author)

Coral reefs are highly valuable structures in many respects and it is increasingly important to understand hydrodynamics and morphodynamics around reefs to be able to better protect them and their hinterland. Flume experiments were performed on a scaled fringing reef in the laboratory facilities of Deltares in Delft. The objective of this thesis...

master thesis 2013

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On the possibility of simulating pile set-up in sand by means of centrifuge model testing

De Lange, D.A. (author)

An increase over time in bearing capacity of displacement piles is often found in the field. This phenomenon is called pile set-up. The increase is predominantly caused by an increase in shaft resistance and is observed even until 1000 days after installation. In the Dutch situation, a proposed tightening of the design standard for pile...

master thesis 2013

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Wi-Fi Direct based Smart Set-up (WDSS) in Lighting Systems

Zhang, N. (author)

The Wireless Lighting Control System has drawn intensive attention in the recent years due to the potential for huge cost savings as well as increased convenience. Commonly seen Wireless Lighting Control Systems utilize Zigbee, KNX and Z-WAVE; whereas little attention has been given to Wi-Fi because of unsolved limitations. The purpose of this...

master thesis 2012

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Modelling nearshore currents driven by waves and set-up gradients

Van der Linde, P. (author)

During the fall of 2003, an extensive measurement campaign called the “Nearshore Canyon Experiment” (NCEX) was set up along the coast of La Jolla, California. The project site covered an area in which two submarine canyons are located, respectively La Jolla and Scripps Submarine Canyon. Over 20 institutions collaborated on recording the...

master thesis 2010

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Interaction between Hydraulic Fracturing Process and Pre-existing Natural Fractures

Meng, C. (author)

Hydraulic fracturing is employed as a stimulation treatment by the oil and gas industry to enhance the hydro-carbon recoveries. The rationale is that by creating fractures from the wellbore into the surrounding formations, the conductivity between the well and reservoir is significantly increased and the hydro-carbon flow is therefore stimulated...

doctoral thesis 2010

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Short wave breaking effects on low frequency waves

Daly, C. (author), Roelvink, J.A. (author), Van Dongeren, A. (author), Van Thiel de Vries, J.S.M. (author), McCall, R.T. (author)

The effect of short wave breaking on low frequency waves is investigated using two breaker formulations implemented in a time-dependent numerical model (XBeach): (1) an advective-deterministic approach (ADA) and (2) the probabilistic breaker formulation of Roelvink (1993). Previous research has shown that the ADA breaker model gives different...

conference paper 2010

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Combined reactions and separations using ionic liquids and carbon dioxide

Kroon, M.C. (author)

A new and general type of process for the chemical industry is presented using ionic liquids and supercritical carbon dioxide as combined reaction and separation media. In this process, the carbon dioxide pressure controls the miscibility of reactants, products, catalyst and ionic liquid, enabling fast atom-efficient reactions in a homogenous...

doctoral thesis 2006