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Groen, M. (author), Van Schravendijk, M. (author), Barrett, R. (author), Vos, R. (author)The dynamic response of a new class of flight control actuators that rely on post-buckled recompressed (PBP) piezoelectric elements is investigated. While past research has proven that PBP actuators are capable of generating deflections three times higher than conventional bimorph actuators, this paper quantifies the work output and power...conference paper 2009
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We will present the results of our recent numerical work on the nature of the phase diagram of turbulent Taylor-Couette (TC) flow, both with co- and counterrotating cylinder. The work can be seen as the extension of the famous experimental Andereck et al. phase diagram for Taylor-Couette flow just above the onset of instabilities, towards the...conference paper 2015
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Gentile, V. (author), Schrijer, F.F.J. (author), Van Oudheusden, B.W. (author), Scarano, F. (author)Stereoscopic Particle Image Velocimetry (PIV) was used to study the wake of an ogive-cylinder with after-body at a diameter-based Reynolds number ReD = 6.7 · 104. The vertical fluctuations reduced from a maximum of 0.18 U? in absence of rear-protrusion, up to 0.12 U? and 0.1 U? when the main-body to after- body diameter ratio d/D was increased...conference paper 2015
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Koedijk, O.C. (author)As a result of diminishing budgets for maintenance, the Dutch waterway authority Rijkswaterstaat is amongst others in search for economizing infrastructural facilities for commercial inland vessels along its waterways. One type of those facilities are the mooring constructions for line up- and waiting areas at lock approaches. Another type are...conference paper 2015
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Duz, B. (author), Huijsmans, R.H.M. (author), Veldman, A.E.P. (author), Borsboom, M.J.A. (author), Wellens, P.R. (author)In this paper the use of an absorbing boundary condition (ABC) is investigated for the numerical simulation of regular and irregular waves in three dimensional computational domains where Navier-Stokes equations describe the motion of the fluid. The numerical implementation of the ABC using a staggered grid arrangement is explained in detail....conference paper 2011
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Geurts, B.M. (author), Simao Ferreira, C. (author), Van Bussel, G.J.W. (author)Wind energy in the urban environment faces complex and often unfavorable wind conditions. High turbulence, lower average wind velocities and rapid changes in the wind direction are common phenomena in the complex built environments. A possible way to improve the cost-efficiency of urban wind turbines is the application of flowenhancing...conference paper 2010
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Li, Mingqi (author), Chen, Huisu (author), Lin, Jianjun (author)Porous networks provide the main transport channels to the active media, which will damage the microstructure and then lead to a subsequent reduction in the strength, serviceability and aesthetic of porous materials. The connectivity of the porous network plays an essential role in the transport properties of these active media. In statistic...conference paper 2021
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Bochev, P. (author), Gerritsma, M.I. (author)We present a spectral mimetic least-squares method which is fully conservative and decouples the primal and dual variables.conference paper 2014
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We investigate the effect of temperature dependent thermal conductivity λ and isobaric specific heat c_P on the transient amplification of perturbations in a thermally stratified laminar plane Poiseuille flow. It is shown that for decreasing thermal conductivity the maximum transient energy growth is amplified with respect to the λ=1 case, while...conference paper 2015
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