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- Bijl, M. (author), Reniers, A. (author), Ewans, K. (author), Masterton, S. (author), Huijsmans, R.H.M. (author) conference paper 2009
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Van der Velden, W.C.P. (author), Van Zuijlen, A.H. (author), De Jong, A.T. (author), Bijl, H. (author)A Large Eddy Simulation (LES) with four different closure models are analyzed in OpenFOAM, an open source Computional Fluid Dynamics (CFD) package and validated for the determination of the streamwise and spanwise coherence length of the pressure field below a turbulent boundary layer at low Reynolds numbers. Matching results are found for outer...conference paper 2014
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- Lucas, P. (author), Bijl, H. (author) conference paper 2007
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Witteveen, J.A.S. (author), Bijl, H. (author)An efficient uncertainty quantification method for unsteady problems is presented in order to achieve a constant accuracy in time for a constant number of samples. The approach is applied to the aeroelastic problems of a transonic airfoil flutter system and the AGARD 445.6 wing benchmark with uncertainties in the flow and the structure.conference paper 2009
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Witteveen, J.A.S. (author), Bijl, H. (author)A robust and efficient uncertainty quantification method is presented for resolving the effect of uncertainty on the behavior of multi-physics systems. The extrema diminishing method in probability space maintains a bounded error due to the interpolation of deterministic samples at constant phase in a transonic airfoil flutter problem.conference paper 2009
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- Deng, S. (author), Van Oudheusden, B.W. (author), Remes, B.D.W. (author), Persin, M. (author), Bijl, H. (author), Ruijsink, H.M. (author) conference paper 2013
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De Baar, J.H.S. (author), Dwight, R.P. (author), Bijl, H. (author)We apply Ordinary Kriging to predict 75,000 terrain survey data from a randomly sampled subset of < 2500 observations. Since such a Kriging prediction requires a considerable amount of CPU time, we aim to reduce its computational cost. In a conventional approach, the cost of the Kriging analysis would be dominated by the optimization routine...conference paper 2011
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Boon, D.J. (author), Dwight, R.P. (author), Sterenborg, J.J.H.M. (author), Bijl, H. (author)We perform a fully stochastic analysis of an experiment in aerodynamics. Given estimated uncertainties on the principle input parameters of the experiment, including uncertainties on the shape of the model, we apply uncertainty propagation methods to a suitable CFD model of the experimental setup. Thereby we predict the stochastic response of...conference paper 2012
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Gillebaart, T. (author), Van Zuijlen, A.H. (author), Bijl, H. (author)In this paper, the influence of wing flexibility and the 'clap-and-peel' motion (one versus two wings) on the upward (lifting) force in hover is studied. CFD simulations based on the ALE Navier-Stokes equations together with radial basis function mesh interpolation are used. For the 'clap-and-peel' motion an immersed symmetry plane is introduced...conference paper 2011
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Fernandes, O. (author), Blom, D.S. (author), Frey, S. (author), Van Zuijlen, A.H. (author), Bijl, H. (author), Ertl, T. (author)We present an integrated in-situ visualization approach for partitioned multi-physics simulation of fluid-structure interaction. The simulation itself is treated as a black box and only the information at the fluid-structure interface is considered, and communicated between the fluid and solid solvers with a separate coupling tool. The...conference paper 2015
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Kazemi Kamyab, V. (author), Van Zuijlen, A.H. (author), Bijl, H. (author)Noting that time-accurate computations of the unsteady incompressible Navier-Stokes (INS) equations can be computationally expensive, a family of higher order implicit multi-stage time integration schemes (namely ESDIRK) is used for advancing the solution to the unsteady INS in time. The higher order time integration schemes have the potential...conference paper 2012
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Salauddin, M. (author), Broere, A. (author), Van der Meer, J.W. (author), Verhagen, H.J. (author), Bijl, E. (author)A new and symmetrical single layer armour unit, the crablock, has been designed in the UAE. One breakwater was reconstructed with crablock, but very limited testing had been performed. Just to become more acquainted with this new unit, pre-competitive research at a university has been performed, which is the subject of this paper. Being a new...conference paper 2015
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Witteveen, J.A.S. (author), Bijl, H. (author)A monomial chaos approach is proposed for efficient uncertainty quantification in nonlinear computational problems. Propagating uncertainty through nonlinear equations can still be computationally intensive for existing uncertainty quantification methods. It usually results in a set of nonlinear equations which can be coupled. The proposed...conference paper 2006
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Loeven, G.J.A. (author), Bijl, H. (author)In this paper the Probabilistic Collocation method is used for uncertainty quantification of operational uncertainties in a transonic axial flow compressor (i.e. NASA Rotor 37). Compressor rotors are components of a gas turbine that are highly sensitive to operational and geometrical uncertainties. Validation of the Probabilistic Collocation...conference paper 2010
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- Witteveen, J.A.S. (author), Bijl, H. (author) conference paper 2008
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Noyon, T.A. (author), Tay, W.B. (author), Van Oudheusden, B.W. (author), Bijl, H. (author)A three-dimensional simulation of hovering flapping wings was performed using an immersed boundary method. This was done to investigate the effects of chordwise wing deformation on three important unsteady aerodynamic mechanisms found in flapping flight, namely Leading Edge Vortex (LEV) shedding, wake capture and clap and fling. A wing was...conference paper 2014
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- Bijl, H. (author), Wesseling, P. (author) conference paper 1997
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Tay, W.B. (author), Van Oudheusden, B.W. (author), Bijl, H. (author)The numerical simulation of a “X-wing” type biplane flapping wings, has been performed in 3D using the Immersed Boundary Method (IBM). This “X-wing” type flapping configuration draws its inspiration from Delfly [1], a family of ornithopters developed by the Delft University of Technology, as shown in Figure 1. The unique “X-wing” design features...conference paper 2013
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Blom, D.S. (author), Van Zuylen, A.H. (author), Bijl, H. (author)Strongly coupled partitioned fluid-structure interaction problems require multiple coupling iterations per time step. The fluid domain and the structure domain are solved multiple times in each time step such that the kinematic and dynamic interface conditions on the fluid-structure interface are satisfied. Quasi-Newton methods have been...conference paper 2014
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De Jong, A.T. (author), Bijl, H. (author)Cavity aeroacoustic noise is relevant for aerospace and automotive industries and widely investigated since the 1950’s. Most investigations so far consider cavities where opening length and width are of similar scale. The present investigation focuses on a less investigated setup, namely cavities that resemble the door gaps of automobiles. These...conference paper 2010