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Duz, B. (author), Borsboom, M.J.A. (author), Veldman, A.E.P. (author), Wellens, P.R. (author), Huijsmans, R.H.M. (author)In this paper, the use of an absorbing boundary condition (ABC) is investigated for the numerical simulation of free surface water waves. An enhanced type of an ABC based on the first- and second-order Higdon boundary conditions is presented. The numerical implementation of the ABC using a staggered grid arrangement is explained in detail....journal article 2017
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- Chang, Xing (author), Akkerman, I. (author), Veldman, A.E.P. (author), Huijsmans, R.H.M. (author) conference paper 2016
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- Hosseini, S.M. (author), Akkerman, I. (author), Veldman, A.E.P. (author), Huijsmans, R.H.M. (author) conference paper 2016
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Chang, X. (author), Akkerman, I. (author), Huijsmans, R.H.M. (author), Veldman, A.E.P. (author)The CFD simulation tool ComFLOW is extended to investigate the characteristics of wave motions in the presence of steady uniform currents. Initially, the inflow boundary is the superposition of waves and current. Effect of the latter on the former is resolved by solving Navier-Stokes equations within the domain as a next step. A Generating and...conference paper 2016
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Duz, B. (author), Borsboom, M.J.A. (author), Veldman, A.E.P. (author), Wellens, P.R. (author), Huijsmans, R.H.M. (author)In this paper the attention is focused on the effect of various VOF methods on efficient and accurate simulation of free surface water waves. For this purpose, we will compare several VOF methods in numerical simulations of propagating waves where strong nonlinear behavior is dominant in the flow. Comparisons and discussions will be provided to...conference paper 2016
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- Duz, B. (author), Borsboom, M.J.A. (author), Wellens, P.R. (author), Veldman, A.E.P. (author), Huijsmans, R.H.M. (author) conference paper 2013
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- Duz, B. (author), Huijsmans, R.H.M. (author), Borsboom, M.J.A. (author), Wellens, P.R. (author), Veldman, A.E.P. (author) conference paper 2012
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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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Luppes, R. (author), Duz, B. (author), Van der Heiden, H.J.L. (author), Van der Plas, P. (author), Veldman, A.E.P. (author)The simulation tool ComFLOW, developed for accurate predictions of hydrodynamic wave loading, is based on the Navier-Stokes equations. The free-surface dynamics is described through VOF, with local height-function approach to enhance accuracy. Numerical reflections are prevented by specially designed absorbing boundary conditions. Gravity...conference paper 2011
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- Veldman, A.E.P. (author), Luppes, R. (author), Bunnik, T. (author), Huijsmans, R.H.M. (author), Duz, B. (author), Iwanowski, B. (author), Wemmenhove, R. (author), Borsboom, M.J.A. (author), Wellens, P.R. (author), van der Heiden, H.J.L. (author), van der Plas, P. (author) conference paper 2011
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Veldman, A.E.P. (author)Non-linear free-surface phenomena, such as extreme waves and violent sloshing, and their impact on the dynamics response of the containing vessels have long been subjects that could only be studied with experimental methods. Nowadays, computational CFD tools can make a significant contribution to these flow problems. The paper starts with a...conference paper 2006
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Wemmenhove, R. (author), Loots, G.E. (author), Veldman, A.E.P. (author)The numerical simulation of hydrodynamic wave loading on different types of offshore structures is important to predict forces on and water motion around these structures. This paper presents a numerical study of the effects of two-phase flow on an offshore structure subject to breaking waves. The numerical model, an improved Volume Of Fluid ...conference paper 2006
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Verstappen, R.W.C.P. (author), Veldman, A.E.P. (author)We propose to discretize the convective and diffusive operators in the (incom- pressible) Navier-Stokes equations in such a manner that their symmetries are preserved. The resulting spatial discretization inherits all symmetry-related conservation and stability properties from the continuous formulation. In particularly, a symmetry-preserving...conference paper 2006
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Luppes, R. (author), Helder, J.A. (author), Veldman, A.E.P. (author)With the increasing amount of liquid on board spacecraft, liquid management and its influence on the overall spacecraft dynamics is becoming increasingly important. The influence of sloshing liquid may hamper critical manoeuvres in space, such as the docking of liquid-cargo vehicles (e.g. to ISS) or the pointing of observational satellites....conference paper 2006
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- van Daalen, E.F.G. (author), Gerrits, J. (author), Loots, G.E. (author), Veldman, A.E.P. (author) conference paper 2000
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Veldman, A.E.P. (author)Time-integration methods for partitioned dynamical systems and iterative methods for viscous-inviscid interaction are unified using the language of linear algebra. In this way all expertise built up in viscous-inviscid interaction methods becomes available for the integration of partitioned dynamical systems. This report applies some well...report 1989
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- Henkes, R.A.W.M. (author), Veldman, A.E.P. (author) report 1987
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Boerstoel, J.W. (author), Veldman, A.E.P. (author), van der Vooren, J. (author), van der Wees, A.J. (author)Current and mid-term developments in computational 3-D steady aerodynamics software at NLR, focusing on the efficient aerodynamic design of the next generation of transport aircraft, are surveyed on a global level. Following a brief review of the various levels of sophistication in physical flow modelling, and their relation to the aerodynamic...report 1986
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Henkes, R.A.W.M. (author), Veldman, A.E.P. (author)It is known that the classical boundary-layer solution breaks down by the appearance of the Goldstein singularity in a steady solution or Van Dommelen's singularity in an unsteady solution. Interaction between the inviscid flow and the boundary layer removes the Goldstein singularity, until a new critical parameter is reached, corresponding to a...report 1986
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- Botta, E.F.F. (author), Hut, F.J. (author), Veldman, A.E.P. (author) report 1986
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