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Van de Wiel, B.J.H. (author), Moene, A.F. (author), Jonker, H.J.J. (author)The mechanism behind the collapse of turbulence in the evening as a precursor to the onset of the very stable boundary layer is investigated. To this end a cooled, pressure-driven flow is investigated by means of a local similarity model. Simulations reveal a temporary collapse of turbulence whenever the surface heat extraction, expressed in its...journal article 2012
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Böing, S.J. (author), Siebesma, A.P. (author), Korpershoek, J.D. (author), Jonker, H.J.J. (author)This study explores the mechanisms that determine detrainment in deep cumulus convection. A set of 90 high-resolution Large Eddy Simulations is used to systematically explore the sensitivity of continental deep convection to the relative humidity and stability of the free troposphere. It appears that variations in the mass-flux profiles are...journal article 2012
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Stive, M.J.F. (author), Tran, T.T. (author), Nghiem, T.L. (author)A review will be presented of the theory behind stable and unstable coastal inlet cross-sectional behaviour. The theoretical findings behind stable coastal inlet cross-sectional behaviour will be reviewed, analysed and confronted with empirical findings, leading to some unresolved questions. Second, seasonal variations will be shown to induce...conference paper 2012
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Kazemi Kamyab, V. (author), Van Zuijlen, A.H. (author), Bijl, H. (author)Thermal interaction of fluids and solids, or conjugate heat transfer (CHT), is encountered in many engineering applications. Since time-accurate computations of such coupled problems can be computationally expensive, we consider loosely-coupled and strongly- coupled solution algorithms in which higher order multi-stage Runge-Kutta schemes are...conference paper 2012
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Zhebel, E. (author), Minisini, S. (author), Mulder, W.A. (author)We solve the three-dimensional acoustic wave equation, discretized on tetrahedral meshes. Two methods are considered: mass-lumped continuous finite elements and the symmetric interior-penalty discontinuous Galerkin method (SIP-DG). Combining the spatial discretization with the leap-frog time-stepping scheme, which is second-order accurate and...conference paper 2012
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Eickhoff, C. (author), De Vries, A.P. (author)Crowdsourcing successfully strives to become a widely used means of collecting large-scale scientific corpora. Many research fields, including Information Retrieval, rely on this novel way of data acquisition. However, it seems to be undermined by a significant share of workers that are primarily interested in producing quick generic answers...journal article 2012
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Ji, L. (author), Xu, Y. (author)In (Xu and Shu in J. Sci. Comput. 40:375–390, 2009), a local discontinuous Galerkin (LDG) method for the surface diffusion of graphs was developed and a rigorous proof for its energy stability was given. Numerical simulation results showed the optimal order of accuracy. In this subsequent paper, we concentrate on analyzing a priori error...journal article 2011
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Meng, F. (author)Nowadays, many modern countries are relying heavily on non-renewable resources. One common example of non-renewable resources is fossil fuel. Non-renewable resources are ?nite resources that will eventually dwindle, becoming too expensive or too environmentally damaging to retrieve. In contrast, renewable energy resources, like wind energy, are...doctoral thesis 2011
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Yan, C. (author), Bergsma, O. (author), Koussios, S. (author), Zu, L. (author), Beukers, A. (author)The sandwich composites fuselages appear to be a promising choice for the future aircrafts because of their structural efficiency and functional integration advantages. However, the design of sandwich composites is more complex than other structures because of many involved variables. In this paper, the fuselage is designed as a sandwich...journal article 2010
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Kleinhans, M.G. (author), Jagers, H.R.A. (author), Mosselman, E. (author), Sloff, C.J. (author)At river bifurcations, water and sediment are divided over two branches. The dynamics of the bifurcation determine the long-term evolution (centuries) of the downstream branches, potentially leading to avulsion, but the dynamics are poorly understood. The long-term evolution can only be studied by one-dimensional models because of computational...journal article 2008
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Marcel, C.P. (author)The stability of natural circulation boiling water reactors is investigated with a strong emphasis on experiments. Two different facilities are used for such a task: the GENESIS facility (to which a void reactivity feedback system is artificially added) and the CIRCUS facility. In addition, numerical codes are also used in the investigation.doctoral thesis 2007
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Dijkstra, W.O. (author)In the thesis two different models of solidification of aluminum alloys are presented and analyzed. The first 1--D solidification model is derived from the conservation of solute, heat and mass. With numerical experiments it is shown that simulations with the Finite Difference discretization must adhere a relation similar to the Courant...doctoral thesis 2007
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Van Dijk, T. (author)For almost a century and a half, mathematicians have been racking their brains about the bike. How can a rolling bicycle be so stable of its own accord? Delft researchers now say they have completed the model to end all models. Bicycle manufacturer Batavus intends to use it to make better bikes for the elderly and disabled.journal article 2007
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- Silberova, B.A.A. (author), Makkee, M. (author), Moulijn, J.A. (author) journal article 2007
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Juliana, S. (author)The objective of the research was to identify and evaluate promising mathematical techniques for re-entry flight clearance. To fulfil this objective, two mathematical methods were investigated and developed: μ analysis for linear models and interval analysis for both linear and non-linear models. The stability of re-entry vehicles in the...doctoral thesis 2006
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Gaspar, F.J. (author), Lisbona, F.J. (author), Oosterlee, C.W. (author)In this work, we present a robust and efficient multigrid solver for a reformulated version of the system of poroelasticity equations. The reformulation enables us to treat the system in a decoupled fashion. It is sufficient to choose a highly efficient multigrid method for a scalar Poisson type equation for the overall solution of this...conference paper 2006
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Hartmann, L. (author)It is easy to see whether a system in equilibrium is stable when there are only two forces acting on it, as in a swing. But until recently, this was impossible for an equilibrium involving three forces, as in a hammock. A team of structural engineers at TU Delft have discovered a mathematical method of determining the stability of an equilibrium...journal article 2006
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- Reverter, F. (author), Li, X. (author), Meijer, G.C.M. (author) journal article 2006
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- Guet, S. (author), Ooms, G. (author) journal article 2006
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Oosterom, R. (author)The shoulder joint provides us with a large range of motion. This is enabled by the shallowness of the glenoid cavity and the cooperation of many bone elements of the shoulder girdle. This results in complex biomechanics and dependency to surrounding soft tissues for its stability. Due to a fracture or joint diseases, a shoulder replacement may...doctoral thesis 2005