document

Five golden principles to advance marine reef restoration by linking science and industry

ter Hofstede, R. (author), Bouma, Tjeerd J. (author), van Koningsveld, M. (author)

Marine reef ecosystems have degraded massively worldwide, and restoration efforts have as yet not managed to realize the scale required to reverse continued degradation. To achieve effective scales, scientific insights in restoration methods should be paired with industry-based approaches used for infrastructural development. We illustrate by...

journal article 2023

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Hierarchical Upscaling of Data-Driven Damage Diagnostics for Stiffened Composite Aircraft Structures

Broer, Agnes A.R. (author), Yue, N. (author), Galanopoulos, Georgios (author), Benedictus, R. (author), Loutas, Theodoros (author), Zarouchas, D. (author)

To move towards a condition-based maintenance practice for aircraft structures, design of reliable health management methodologies is required. Development of diagnostic methodologies is commonly realised on simplified sample structures with assumptions that methodologies can be adapted for application to realistic aircraft structures under...

conference paper 2023

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Biophilia Upscaling: A Systematic Literature Review Based on a Three-Metric Approach

Lefosse, D.C. (author), van Timmeren, A. (author), Ratti, Carlo (author)

In response to socio-ecological challenges, cities around the world are implementing greenification and urban forestry. While these strategies contribute to reducing the ecological footprint, they often overlook various social implications. This explains the increasing global attention to Biophilia, which emphasizes human–nature interaction to...

review 2023

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μCT scans permeability computation with an unfitted boundary method to improve coarsening accuracy

Lesueur, M. (author), Rattez, Hadrien (author), Colomés, Oriol (author)

Flow simulations on porous media, reconstructed from Micro-Computerised Tomography (μCT) scans, is becoming a common tool to compute the permeability of rocks. Still, some conditions need to be met to obtain accurate results. Only if the sample size is equal or larger than the Representative Elementary Volume will the computed effective...

journal article 2022

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Upscaling scenarios for ocean thermal energy conversion with technological learning in Indonesia and their global relevance

Langer, J.K.A. (author), Quist, J.N. (author), Blok, K. (author)

Ocean Thermal Energy Conversion (OTEC) is a promising renewable energy technology that is the most economical at large scale. But contemporary literature does not address how OTEC could reach such scale with current technology, and what the techno-economic impact of location-dependent factors and technological learning are. This paper tackles...

journal article 2022

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Influence of cementation on the yield surface of rocks numerically determined from digital microstructures

Lesueur, M. (author), Veveakis, Manolis (author), Rattez, Hadrien (author)

Digital Rock Physics has reached a level of maturity on the characterisation of primary properties that depend on the microstructure - such as porosity, permeability or elastic moduli - by numerically solving field equations on μCT scan images of rock. After small deformations or at depth though, most rocks eventually reach their limit of...

journal article 2022

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Reconciling asymmetry observations in the permeability tensor of digital rocks with symmetry expectations

Lesueur, M. (author), Guével, Alexandre (author), Poulet, Thomas (author)

Modelling anisotropic flow in rocks requires their full permeability tensor. While theories derived from the upscaling of Stokes flow to Darcy's law may justify the tensor symmetry, homogenisations from micro-scale rock samples often return a non-zero level of asymmetry. Since most studies dismiss these controversial observations as numerical...

journal article 2022

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An efficient adaptive implicit scheme with equivalent continuum approach for two-phase flow in fractured vuggy porous media

Wang, L. (author), Golfier, Fabrice (author), Tinet, Anne-Julie (author), Chen, Weizhong (author), Vuik, Cornelis (author)

This work investigates numerical method and equivalent continuum approach (ECA) of fluid flow in fractured porous media. The commonly used discrete fracture model (DFM) without upscaling needs full discretization of all fractures. It enjoys the merit of capturing each fracture accurately but will get in trouble with mesh partition and low...

journal article 2022

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Transport and Morphodynamics in a Fine Sediment Estuary: From Conceptual Understanding to Numerical Modeling

Mathew, R. (author)

This dissertation presents a study of fine sediment transport and morphodynamics in estuarine settings using data from the Lower Passaic River (LPR), located in New Jersey, USA. Originally a relatively shallow system, it has been dredged and deepened for navigation purposes from the late-1800s onwards, along with other modifications such as...

doctoral thesis 2021

document

Institutional Barriers to Near Zero-Energy Housing: A Context Specific Approach

Souaid, C. (author), van der Heijden, H.M.H. (author), Elsinga, M.G. (author)

After more than ten years since the introduction of Near Zero-Energy Buildings (NZEBs), the transition towards a zero-energy new built environment can still be considered slow despite European Member States’ various efforts to facilitate, promote and accelerate their implementation and uptake. The barriers to sustainability measures in general...

journal article 2021

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Nature-based solutions efficiency evaluation against natural hazards: Modelling methods, advantages and limitations

Kumar, Prashant (author), Debele, Sisay E. (author), Sahani, Jeetendra (author), Rawat, Nidhi (author), Marti-Cardona, Belen (author), Alfieri, S.M. (author), Basu, Bidroha (author), Basu, Arunima Sarkar (author), Menenti, M. (author)

Nature-based solutions (NBS) for hydro-meteorological risks (HMRs) reduction and management are becoming increasingly popular, but challenges such as the lack of well-recognised standard methodologies to evaluate their performance and upscale their implementation remain. We systematically evaluate the current state-of-the art on the models...

review 2021

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A novel hybrid model for multiphase flow in complex multi-scale fractured systems

Li, L. (author), Voskov, D.V. (author)

We present a multi-level discrete fracture model (MLDFM) to guarantee a robust and efficient solution for naturally fractured reservoir simulation. In MLDFM, we apply a triple continuum model using structured grid for forward simulation where large-scale fractures are represented with numerical embedded discrete fracture model (EDFM) and the...

journal article 2021

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A Computational Workflow for Flow and Transport in Fractured Porous Media Based on a Hierarchical Nonlinear Discrete Fracture Modeling Approach

Zhang, Wenjuan (author), Diab, Waleeb (author), Hajibeygi, H. (author), Al Kobaisi, Mohammed (author)

Modeling flow and transport in fractured porous media has been a topic of intensive research for a number of energy- and environment-related industries. The presence of multiscale fractures makes it an extremely challenging task to resolve accurately and efficiently the flow dynamics at both the local and global scales. To tackle this challenge,...

journal article 2020

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The role of public funding in the initiation and upscaling of collective innovation trajectories

Rukanova, B.D. (author), Post, Suzanne (author), Tan, Y. (author), Migeotte, Jonathan (author), Slegt, Micha (author), Wong, Susana (author), Hintsa, Juha (author)

Our society is facing big challenges and public organizations have a key role in addressing these, as well as providing public funding for innovation. Many innovation projects however result in a proof-of-concept and deliver initial results but experience issues with upscaling further to realize impact. In the EU, innovation networks are...

conference paper 2020

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Evaluating compressive mechanical LDPM parameters based on an upscaled multiscale approach

Lifshitz Sherzer, G. (author), Schlangen, E. (author), Ye, G. (author), Gal, A. E. (author)

We propose an upscaled methodology for evaluating the compressive parameters of the Lattice Discrete Particle Model (LDPM) for a multiscale analysis of concrete structures. This methodology is based on mechanical and chemical models on a wide range of concrete scales. We show that the compressive mechanical parameters are related mainly to...

journal article 2020

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Computational derivation of conditions for upscalability of bioclogging in pore network models

Lopez Pena, L.A. (author)

During the primary oil recovery, wells are drilled into the reservoir, and due to natural driving forces, the oil flows to the surface through these production wells. Unfortunately, the production of oil in this first stage is typically between only five and ten percent of the oil in place in the reservoir. In the secondary oil recovery some...

doctoral thesis 2019

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DEM particle upscaling for large-scale bulk handling equipment and material interaction

Lommen, S.W. (author), Mohajeri, M. (author), Lodewijks, G. (author), Schott, D.L. (author)

Purpose: The development of bulk material handling equipment can be accelerated and made less expensive when testing of virtual prototypes is adopted. However, the modelling of a grab unloader requires a large volume (77 m3) of iron ore pellets, making the computational costs prohibitive. This paper investigates the extent to which the...

journal article 2019

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Modeling of gas flow in confined formations at different scales

Awadalla, Tarek (author), Voskov, D.V. (author)

Gas flow in fractured nano-porous shale formations is complicated by a hierarchy of structural features, ranging from nanopores to hydraulic fractures, and by several transport mechanisms that differ from standard viscous flow used in reservoir modeling. The use of accurate simulation techniques that honor the physical complexity of these...

journal article 2018

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Multiscale reconstruction in physics for compositional simulation

Ganapathy, Chandrashekar (author), Voskov, D.V. (author)

A compositional formulation is a reliable option for understanding the complex subsurface processes and the associated physical changes. However, this type of model has a great computational cost, since the number of equations that needs to be solved in each grid block increases proportionally with the number of components employed. To...

journal article 2018

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Conditions for upscalability of bioclogging in pore network models

Lopez Pena, L.A. (author), Meulenbroek, B.J. (author), Vermolen, F.J. (author)

In this work, we model the biofilm growth at the microscale using a rectangular pore network model in 2D and a cubic network in 3D. For the 2D network, we study the effects of bioclogging on porosity and permeability when we change parameters like the number of nodes in the network, the network size, and the concentration of nutrients at the...

journal article 2018