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Van Lier, J.B. (author), Van der Zee, F.P. (author), Frijters, C.T.M.J. (author), Ersahin, M.E. (author)In the last 40 years, anaerobic sludge bed reactor technology evolved from localized lab-scale trials to worldwide successful implementations at a variety of industries. High-rate sludge bed reactors are characterized by a very small foot print and high applicable volumetric loading rates. Best performances are obtained when the sludge bed...journal article 2015
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Borghans, J.W. (author), Luijben, W.J.M. (author), Van Zaal, C.J. (author), Van Zanten, S.C. (author), Van Eijk, T.F.A. (author), Van der Zee, W. (author)In 2014, NGO FT Kilimanjaro (FTK) focussed on southern Lower Moshi in order to avoid poverty and despair in this place. This southern Lower Moshi area is situated south of TPC; a large sugarcane plantation in the North of Tanzania, south of Mt. Kilimanjaro. After the exploratory interviews with the villagers, conducted by FTK, it appeared that...student report 2015
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Van der Zee, F.F. (author), Frissel, J.Y. (author)In 2003 braken bij Wilnis en Terbregge de (veen)dijken door als gevolg van extreme droogte. Sinds die tijd is veel zorg en aandacht besteed aan deze nieuwe vorm van bezwijkende dijken. Naast de grondsoort (klei, veen) als belangrijkste factor is ook de vegetatie mogelijk van invloed op het ontstaan van scheuren in de kade.report 2014
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Van der Zee, F. (author)Het gepresenteerde werk is de uitkomst van een duaal-afstudeerproject, waarmee zowel een Master Architectuur als Stedenbouw is behaald. Het onderzoek is uitgevoerd binnen de studio ‘vernieuwing van de stadsvernieuwing’, waarin onderzocht werd hoe wijkgerichte en stedelijke voorzieningen ingezet kunnen worden als instrument voor stedelijke...master thesis 2013
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- Grelot, A. (author), Dereli, R.K. (author), Van der Zee, F.P. (author), Van der Lubbe, J.G.M. (author), Heffernan, B. (author) journal article 2012
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Van der Zee, R.A. (author)One of the failure mechanisms of a dike is piping. A water level difference between the two sides of a dike causes a groundwater flow in the sand layer under the (clay)dike. This flow can transport sand from under the dike to the exit point of the groundwater flow. The formula of Sellmeijer is derived mathematically from the equation of...master thesis 2011
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Van der Zee, K.G. (author), Van Brummelen, E.H. (author), De Borst, R. (author)We develop duality-based a posteriori error estimates for functional outputs of solutions of free-boundary problems via shape-linearization principles. To derive an appropriate dual (linearized adjoint) problem, we linearize the domain dependence of the very weak form and goal functional of interest using techniques from shape calculus. We show...journal article 2010
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Van der Zee, K.G. (author), Van Brummelen, E.H. (author), De Borst, R. (author)In free-boundary problems, the accuracy of a goal quantity of interest depends on both the accuracy of the approximate solution and the accuracy of the domain approximation. We develop duality-based a posteriori error estimates for functional outputs of solutions of free-boundary problems that include both sources of error. The derivation of an...journal article 2010
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Moerman, E. (author), Drieman, R. (author), Mous, B. (author), Li, L. (author), Kluwen, J. (author), Van der Linde, P. (author), Ritsema, A. (author), Lioutas, A. (author), Monden, M. (author), Tsimopoulou, V. (author), Jumelet, D. (author), Bos, M. (author), Van der Zee, R. (author), Hoss, F. (author), Ros, R. (author)The beach in front of the hotel Sirius is suffering from a retreating coastline. Bathymetry and beach profiles were measured. With the data from previous years the long term evolution of the coast was analyzed. The main conclusions were that the beach in front of the Sirius hotel is still suffering from erosion and if this erosion trend...student report 2009
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Van der Zee, K.G. (author)The simulation of complex physical phenomena, such as fluid–structure interaction, appears to be within reach in view of the significant progress in computing power over the last decades. Yet, we are still far away from what is desirable in an evermore-demanding, science-and-technology-based society. If, however, we are modest with what we need...doctoral thesis 2009
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Fick, P.W. (author), Van der Zee, K.G. (author), Van Brummelen, E.H. (author)Numerical simulation of fluid-structure interaction generally requires vast computational resources. Paradoxically, the computational work is dominated by the complexity of the subsystem that is of least practical interest, viz. the fluid. The resolution of each of the many small-scale features in the fluid is prohibitively expensive. However,...report 2008
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Van der Zee, K.G. (author), Van Brummelen, E.H. (author), De Borst, R. (author)Coercivity of the bilinear form in a continuum variational problem is a fundamental property for finite-element discretizations: By the classical Lax–Milgram theorem, any conforming discretization of a coercive variational problem is stable; i.e., discrete approximations are well-posed and possess unique solutions, irrespective of the specifics...journal article 2006
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Heemskerk, T.K. (author), Van Brummelen, E.H. (author), Van der Zee, K.G. (author)The essential difficulty in the numerical solution of the incompressible Navier-Stokes (NS) equations is the coupling between the pressure and the velocity. The coupling enforces a constraint on the relation between the pressure and the velocity space. This constraint can be studied using a simplified form of the NS equations, viz. the Stokes...report 2006
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Van der Zee, K.G. (author), Van Brummelen, E.H. (author), De Borst, R. (author)Numerical simulations of fluid-structure interaction typically require vast computational resources. Finite-element techniques employing goal-oriented hp-adaptation strategies could offer a substantial improvement in the efficiency of such simulations. These strategies rely on dual-based a-posteriori error estimates for quantities of interest....conference paper 2006
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Van der Zee, K.G. (author), Van Brummelen, E.H. (author), De Borst, R. (author)Numerical simulations of fluid-structure interaction typically require vast computational resources. Finite-element techniques employing goal-oriented hp-adaptation strategies could offer a substantial improvement in the efficiency of such simulations. These strategies rely on dual-based a-posteriori error estimates for quantities of interest....conference paper 2006
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Van Brummelen, E.H. (author), Van der Zee, K.G. (author), De Borst, R. (author)The basic iterative method for solving fluid-structure-interaction problems is a defect-correction process based on a partitioning of the underlying operator into a fluid part and a structural part. In the present work we establish for a prototypical model problem that this defect-correction process yields an excellent smoother for multigrid, on...report 2006
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Van der Zee, K.G. (author), Van Brummelen, E.H. (author)Discontinuous Galerkin (DG) methods are finite element techniques for the solution of partial differential equations. They allow shape functions which are discontinuous across inter-element edges. In principle, DG methods are ideally suited for hp-adaptivity, as they handle nonconforming meshes and varying-in-space polynomial-degree...report 2005
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Van der Zee, K.G. (author)Discontinuous Galerkin (DG) methods are finite element techniques for the solution of partial differential equations. They allow shape functions which are discontinuous across inter-element edges. In principle, DG methods are ideally suited for hp-adaptivity, as they handle nonconforming meshes and varying-in-space polynomial-degree...master thesis 2004
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Van der Zee, F.F. (author)Bij het onderzoek is uitgegaan van de volgende vraagstellingen: 1) Welke plantengemeenschappen komen voor op dijken en welk onderscheid bestaat er botanisch tussen de dijken uit het bovenrivierengebied en het benedenrivierengebied? (hoofdstuk 2) 2) Welke relaties bestaan er tussen de aanwezige plantengemeenschappen en de bodem, helling,...report 1992
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Van der Zee, F.A. (author)De primaire waterkeringen van de Nederlandse kust bestaan uit duinen en dijken. De duinen vormen hierin een belangrijke schakel. In verband met de veiligheid mag het niet uitmaken of een stuk land nu door een dijk of door een duin verdedigd wordt en is het dus zaak ervoor te zorgen dat de duinen even sterk zijn als de dijken. In probabilistische...master thesis 1985
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