Searched for: department%3A%22Process%255C%2Band%255C%2BEnergy%22
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van Meerkerk, M. (author), Poelma, C. (author), Hofland, B. (author), Westerweel, J. (author)
We present an experimental study on the gas flow field development over a plunging breaking wave prior to impact on a vertical wall. The variability of wave impact pressure over repeated measurements is well known (Bagnold, 1939). The formation of instabilities on the wave crest are postulated to be the main source of impact pressure variability...
journal article 2022
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Shikhar, Utkarsh (author), Hemmes, Kas (author), Woudstra, T. (author)
Fuel cells are electrochemical devices that are conventionally used to convert the chemical energy of fuels into electricity while producing heat as a byproduct. High temperature fuel cells such as molten carbonate fuel cells and solid oxide fuel cells produce significant amounts of heat that can be used for internal reforming of fuels such...
journal article 2021
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Hogendoorn, W.J. (author), Chandra, B. (author), Poelma, C. (author)
Particle-laden pipe flows exhibit a gradual laminar-turbulent transition, beyond a critical volume fraction (φ). While classical transition behavior is characterized by the presence of turbulent puffs, this intermittent nature is absent for particle-induced transition. For small pipe-to-particle diameter ratios (D/d) even dilute systems...
journal article 2021
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Habibi, P. (author), Vlugt, T.J.H. (author), Dey, P. (author), Moultos, O. (author)
Two-dimensional (2D) boron-based materials are receiving much attention as H2 storage media due to the low atomic mass of boron and the stability of decorating alkali metals on the surface, which enhance interactions with H2. This work investigates the suitability of Li, Na, and K decorations on 2D honeycomb borophene oxide (B2O) for H2...
journal article 2021
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Gravelle, Simon (author), Kamal, Catherine (author), Botto, L. (author)
Using molecular dynamics simulations we investigate the shear-induced rotational dynamics of a Brownian nanographene (hexabenzocoronene) freely suspended in a liquid. We demonstrate that, owing to a finite hydrodynamic slip at the molecular surface, these flat molecules tend to align with a constant orientation angle instead of performing the...
journal article 2021
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Giannoulidis, S. (author), Venkataraman, V. (author), Woudstra, T. (author), Aravind, P.V. (author)
Hydrogen is yet to be widely accepted as a fuel for everyday operation due to stringent safety regulations involved around it. In the meanwhile, methanol could be a potential fuel of the future. In this work, an extensive thermodynamic investigation on an energy storage system with a reversible solid oxide stack at its core is presented. The...
journal article 2020
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Çelik, M. (author), Patki, Mrunal (author), Paulussen, Geert (author), de Jong, W. (author), Boersma, B.J. (author)
In a conventional continuous annealing line, the energy supplied to steel strip during heating is not recovered while cooling it. Therefore, an alternative heat transfer technology for energy efficient continuous annealing of steel was developed. This technology enables reusing the heat extracted during cooling of the strip in the heating...
journal article 2019
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Pérez-Gallent, Elena (author), Turk, Susan (author), Latsuzbaia, Roman (author), Anastasopol, Anca (author), Sastre-Calabuig, Francesc (author), Garcia, Amanda Cristina (author), Giling, Erwin (author), Goetheer, E.L.V. (author)
In industrial electrochemical processes it is of paramount importance to achieve efficient, selective processes to produce valuable chemicals while minimizing the energy input. Although the electrochemical reduction of CO <sub>2</sub> has received a lot of attention in the past decades, an economically feasible process has not yet been...
journal article 2019
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Rajegowda, Rakesh (author), Kannam, Sridhar Kumar (author), Hartkamp, R.M. (author), Sathian, Sarith P. (author)
We investigate thermally driven water droplet transport on graphene and hexagonal boron nitride (h-BN) surfaces using molecular dynamics simulations. The two surfaces considered here have different wettabilities with a significant difference in the mode of droplet transport. The water droplet travels along a straighter path on the h-BN sheet...
journal article 2018
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Hartkamp, R.M. (author), Biance, Anne-Laure (author), Fu, Li (author), Dufrêche, Jean François (author), Bonhomme, Oriane (author), Joly, Laurent (author)
Surface charge controls many static and dynamic properties of soft matter and micro/nanofluidic systems, but its unambiguous measurement forms a challenge. Standard characterization methods typically probe an effective surface charge, which provides limited insight into the distribution and dynamics of charge across the interface, and which...
journal article 2018
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Sivakumarasamy, R. (author), Hartkamp, R.M. (author), Siboulet, Bertrand (author), Dufrêche, Jean François (author), Nishiguchi, K. (author), Fujiwara, A (author), Clément, N. (author)
Despite being ubiquitous in the fields of chemistry and biology, the ion-specific effects of electrolytes pose major challenges for researchers. A lack of understanding about ion-specific surface interactions has hampered the development and application of materials for (bio-)chemical sensor applications. Here, we show that scaling a silicon...
journal article 2018
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Çelik, M. (author), Devendran, Kathikeyan (author), Paulussen, Geert (author), Pronk, Pepijn (author), Frinking, Ferry (author), de Jong, W. (author), Boersma, B.J. (author)
A new concept for energy efficient annealing of steel strip comprises of multiple rotating heat pipes. Each heat pipe extracts heat from the cooling strip which is reused to increase the temperature of the heating strip. In this context, the heat transfer between the steel strip and the rotating heat pipe is investigated. When the strip is...
journal article 2018
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Hartkamp, R.M. (author), Moore, Timothy C. (author), Iacovella, Christopher R. (author), Thompson, Michael A. (author), Bulsara, Pallav A. (author), Moore, David J. (author), McCabe, Clare (author)
The permeability of multicomponent phospholipid bilayers in the gel phase is investigated via molecular dynamics simulation. The physical role of the different molecules is probed by comparing multiple mixed-component bilayers containing distearylphosphatidylcholine (DSPC) with varying amounts of either the emollient isostearyl isostearate or...
journal article 2018
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Sam, Alan (author), Hartkamp, R.M. (author), Kannam, Sridhar Kumar (author), Sathian, Sarith P. (author)
We introduce an analytical method to predict the slip length (L <sub>s</sub>) in cylindrical nanopores using equilibrium molecular dynamics (EMD) simulations, following the approach proposed by Sokhan and Quirke for planar channels [39]. Using this approach, we determined the slip length of water in carbon nanotubes (CNTs) of various...
journal article 2018
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Çelik, M. (author), Paulussen, Geert (author), van Erp, Dennis (author), de Jong, W. (author), Boersma, B.J. (author)
Rotating wickless and stationary capillary cylindrical heat pipes are widely used heat transfer devices. Transient behavior of such heat pipes has been investigated numerically with computational fluid dynamics and lumped parameter models. In this paper, the advantages of both methods are combined into a novel engineering model that is low in...
journal article 2018
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Prasad K, Vishnu (author), Kannam, Sridhar Kumar (author), Hartkamp, R.M. (author), Sathian, Sarith P. (author)
Molecular dynamics simulations are widely employed to analyze water and ion permeation through nanoporous membranes for reverse osmosis applications. In such simulations, water models play an important role in accurately reproducing the properties of water. We investigated the water and ion transport across a hydroxyl (OH) functionalized...
journal article 2018
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Galnares de la Garza, F.O. (author)
In this work, gas phase toluene was degraded as model contaminant in an annular LED-based photocatalytic reactor under various light irradiance and illumination modes as a means to enhance the efficiency in illumination. The effect of controlled periodic illumination was first studied by exploring the effect of the duty cycle and the period and...
master thesis 2017
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Kuikhoven, L.J. (author)
The oceans cover over 70% of the earth’s surface and are therewith the largest source of renewable heat available on the planet. Ocean Thermal Energy Conversion (OTEC) is a process that exploits this low-grade oceanic heat. A heat engine is employed to generate electricity from the small temperature gradient that is available between the...
master thesis 2017
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Raka, Y. (author)
master thesis 2017
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Smink, G. (author)
In the Paris Agreement a total of 195 countries agreed on a legally binding climate deal to bridge towards climate-neutrality before the end of the century. This requires affordable zero emission, heat and transport systems. This research answers the question whether solar and wind generated electricity, with the integration of fuel cell...
master thesis 2017
Searched for: department%3A%22Process%255C%2Band%255C%2BEnergy%22
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