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Finotello, Giulia (author), Padding, J.T. (author), Buist, Kay A. (author), Schijve, Annelien (author), Jongsma, Alfred (author), Innings, Fredrik (author), Kuipers, J.A.M. (author)
Large scale simulation models can aid in improving the design of spray dryers. In this work an Eulerian-Lagrangian model with coupled gas phase and droplet heat and mass transfer balances is used to study airflow dynamics, temperature and humidity profiles at different positions in the spray. The turbulent gas flow is solved using large eddy...
journal article 2019
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Clarke, Nicholas (author), Kuipers, M.C. (author), Stroux, S.A. (author)
Continuity and change have become crucial themes for the built environment and heritage buildings; also in the education and practice of architects. Embedding built heritage values into studio-based design education is a daunting new challenge that demands new didactic perspectives and tools. To address the dilemmas that come with design...
journal article 2019
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Polachan, K.P. (author), Prabhakar, T. V. (author), Singh, Chandramani (author), Kuipers, F.A. (author)
In this paper, we consider Tactile Cyber Physical Systems (TCPS), which differ from typical CPS in that haptic sensory feedback is included. In particular, we design and implement a TCPS testbed, called TCPSbed, using well-defined components and interfaces glued together using APIs. In addition to real connections, our testbed supports the...
conference paper 2019
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Turkovic, B. (author), Kuipers, F.A. (author), Uhlig, Steve (author)
Congestion control algorithms are crucial in achieving high utilization while preventing overloading the network. Over the years, many different congestion control algorithms have been developed, each trying to improve over others in<br/>specific situations. However, their interactions and co-existence has, to date, not been thoroughly evaluated...
conference paper 2019
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Çetinay Iyicil, H. (author), Koc, Y. (author), Kuipers, F.A. (author), Van Mieghem, P.F.A. (author)
Direct connections between nodes usually result in efficient transmission in networks. Such electric power transmission is governed by physical laws, and an assessment purely based on direct connections between nodes and shortest paths may not capture the operation of power grids. Motivated by these facts, in this chapter, we investigate the...
book chapter 2019
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Demetri, Silvia (author), Zuñiga Zamalloa, M.A. (author), Picco, Gian Pietro (author), Kuipers, F.A. (author), Bruzzone, Lorenzo (author), Telkamp, Thomas (author)
Many research and industrial communities are betting on LoRa to provide reliable, long-range communication for the Internet of Things. This new radio technology, however, provides widely heterogeneous coverage; a LoRa link may span hundreds of meters or tens of kilometers, depending on the surrounding environment. This high variability is not...
conference paper 2019
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le Feber, B (author), Sipe, J. E. (author), Wulf, M. (author), Kuipers, L. (author), Rotenberg, Nir (author)
Light is a union of electric and magnetic fields, and nowhere is the complex relationship between these fields more evident than in the near fields of nanophotonic structures. There, complicated electric and magnetic fields varying over subwavelength scales are generally present, which results in photonic phenomena such as extraordinary...
journal article 2019
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Finotello, Giulia (author), Padding, J.T. (author), Buist, Kay A. (author), Jongsma, Alfred (author), Innings, Fredrik (author), Kuipers, J. A.M. (author)
In this work we investigate droplet-droplet collision interactions in a spray system using an Eulerian-Lagrangian model with subgrid turbulence dispersion. The effect of different droplet viscosities on the type and frequency of droplet collision is investigated, knowledge of which is essential for industrial processes such as spray drying...
journal article 2019
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Maitri, R.V. (author), De, S. (author), Koesen, S. P. (author), Wyss, H. M. (author), van der Schaaf, J. (author), Kuipers, J. A.M. (author), Padding, J.T. (author), Peters, E.A.J.F. (author)
In this work, we investigate the influence of channel structure and fluid rheology on non-inertial migration of non-Brownian polystyrene beads. Particle migration in this regime can be found in biomedical, chemical, environmental and geological applications. However, the effect of fluid rheology on particle migration in porous media remains...
journal article 2019
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Kuipers, T. (author), Wu, J. (author), Wang, C.C. (author)
The fabrication flexibility of 3D printing has sparked a lot of interest in designing structures with spatially graded material properties. In this paper, we propose a new type of density graded structure that is particularly designed for 3D printing systems based on filament extrusion. In order to ensure high-quality fabrication results,...
journal article 2019
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Kuipers, Derek A. (author), Terlouw, Gijs (author), Wartena, B.O. (author), Prins, Jelle T. (author), Pierie, Jean Pierrre E.N. (author)
High fidelity is regarded as a hallmark of educational games and simulations for health education. Mainly physical and functional fidelity are associated with authenticity, resulting in the pursuit of a true-to-life simulation and suggesting the imposition of a generally accepted and often unintentional design rationale that assumes that the...
journal article 2019
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Oostenbrink, J. (author), Kuipers, F.A. (author), Helvik, Bjarne E. (author), Heegaard, Poul E. (author)
It is of vital importance to maintain at least some network functionality after a disaster, for example by temporarily replacing damaged nodes by emergency nodes. We propose a framework to evaluate dierent node replacement strategies, based on a large set of representative disasters. We prove that computing the optimal choice of nodes to...
journal article 2019
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Turkovic, B. (author), Kuipers, F.A. (author), Adrichem, N. van (author), Langendoen, K.G. (author)
Along with exciting visions for 5G communications and the Tactile Internet, the networking requirement of attaining extremely low end-to-end latency has appeared. While network devices are typically equipped with buffers to counteract packet loss caused by short-lived traffic bursts, the more those buffers get filled, the more delay is added to...
conference paper 2018
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Finotello, Giulia (author), Kooiman, Roeland F. (author), Padding, J.T. (author), Buist, Kay A. (author), Jongsma, Alfred (author), Innings, Fredrik (author), Kuipers, J. A.M. (author)
Spray drying is an important industrial process to produce powdered milk, in which concentrated milk is atomized into small droplets and dried with hot gas. The characteristics of the produced milk powder are largely affected by agglomeration, combination of dry and partially dry particles, which in turn depends on the outcome of a collision...
journal article 2018
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Seelen, L.H.J. (author), Padding, J.T. (author), Kuipers, J. (author)
A novel granular discrete element method (DEM) is introduced to simulate mixtures of particles of any convex shape. To quickly identify pairs of particles in contact, the method first uses a broad-phase and a narrow-phase contact detection strategy. After this, a contact resolution phase finds the contact normal and penetration depth. A new...
journal article 2018
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Trajanovski, S. (author), Kuipers, F.A. (author), Hayel, Yezekael (author), Altman, Eitan (author), Van Mieghem, P.F.A. (author)
Designing an optimal network topology while balancing multiple, possibly conflicting objectives like cost, performance, and resiliency to viruses is a challenging endeavor, let alone in the case of decentralized network formation. We therefore propose a game-formation technique where each player aims to minimize its cost in installing links,...
journal article 2018
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Finotello, Giulia (author), De, Shauvik (author), Vrouwenvelder, Jeroen C.R. (author), Padding, J.T. (author), Buist, Kay A. (author), Jongsma, Alfred (author), Innings, Fredrik (author), Kuipers, J. A.M. (author)
We investigate the collision behaviour of a shear thinning non-Newtonian fluid xanthan, by binary droplet collision experiments. Droplet collisions of non-Newtonian fluids are more complex than their Newtonian counterpart as the viscosity no longer remains constant during the collision process. Despite the complex collision dynamics, we are...
journal article 2018
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Mahajan, V.V. (author), Padding, J.T. (author), Nijssen, Tim M.J. (author), Buist, Kay A. (author), Kuipers, J. (author)
Fluidization is widely used in industries and has been extensively studied, both experimentally and theoretically, in the past. However, most of these studies focus on spherical particles while in practice granules are rarely spherical. Particle shape can have a significant effect on fluidization characteristics. It is therefore important to...
journal article 2018
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Kamath, S. (author), Padding, J.T. (author), Buist, K. A. (author), Kuipers, J. (author)
A stochastic Direct Simulation Monte Carlo (DSMC) method has been extended for handling bubble-bubble and bubble-wall collisions. Bubbly flows are generally characterized by highly correlated velocities due to presence of the surrounding liquid. The DSMC method has been improved to account for these kind of correlated collisions along with a...
journal article 2018
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çetinay-iyicil, H. (author), Soltan, Saleh (author), Kuipers, F.A. (author), Zussman, Gil (author), Van Mieghem, P.F.A. (author)
In this paper, we compare the effects of failures in power grids under the nonlinear AC and linearized DC power flow models. First, we numerically demonstrate that when there are no failures and the assumptions underlying the DC model are valid, the DC model approximates the AC model well in four considered test networks. Then, to evaluate...
journal article 2018
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