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Nosyk, Yevheniya (author), Lone, Qasim (author), Zhauniarovich, Y. (author), Hernandez Ganan, C. (author), Aben, Emile (author), Moura, Giovane C. M. (author), Tajalizadehkhoob, Samaneh (author), Duda, Andrzej (author), Korczyński, Maciej (author)
DNS is a protocol responsible for translating human-readable domain names into IP addresses. Despite being essential for many Internet services to work properly, it is inherently vulnerable to manipulation. In November 2021, users from Mexico received bogus DNS responses when resolving whatsapp.net. It appeared that a BGP route leak diverged DNS...
conference paper 2023
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Sommese, Raffaele (author), Jonker, Mattijs (author), van der Ham, Jeroen (author), Moura, Giovane C. M. (author)
Electronic government (e-gov) enables citizens and residents to digitally interact with their government via the Internet. Underpinning these services is the Internet Domain Name Systems (DNS), which maps e-gov domain names to Internet addresses. Structuring DNS with multiple levels of redundancy that can withstand stress events such as denial...
conference paper 2022
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Cargnelutti, M. (author), Breugem, W.A. (author), Portela, L.M. (author), Mudde, R.F. (author), Uijttewaal, W.S.J. (author), Stelling, G.S. (author)
In this work, a comparison between the results of point-particle direct numerical simulations and PIV/PTV experiments of a particle-laden horizontal channel flow is presented. The numerical simulations were preformed trying to mimic as much as possible the experimental conditions. The accuracy of the point-particle approach was evaluated by...
conference paper 2006
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Cargnelutti, M. (author), Breugem, W.A. (author), Portela, L.M. (author), Mudde, R.F. (author), Uijttewaal, W.S.J. (author), Stelling, G.S. (author)
In this work, a comparison between the results of point-particle direct numerical simulations and PIV/PTV experiments of a particle-laden horizontal channel flow is presented. The numerical simulations were preformed trying to mimic as much as possible the experimental conditions. The accuracy of the point-particle approach was evaluated by...
conference paper 2006
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Sandberg, R.D. (author), Jones, L.E. (author), Sandham, N.D. (author)
This paper presents a non-reflecting boundary condition that significantly reduces the spurious pressure oscillations that are produced when vortical structures in a compressible flow cross the computational farfield boundaries. The method is based on commonly used characteristic boundary conditions. Here, incoming characteristics are ramped to...
conference paper 2006
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Bastiaans, R.J.M. (author), Van Oijen, J.A. (author), De Goey, L.P.H. (author)
In this paper recent developments in the application of the method of flamelet generated manifolds (FGM) to simulations of turbulent premixed combustion are considered. Initially the method was developed for kinetic reduction for simulations of laminar combustion using stationary solvers. Recently the method was extended to direct numerical...
conference paper 2006
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Jones, L.E. (author), Sandberg, R.D. (author), Sandham, N.D. (author)
Direct numerical simulations of a NACA-0012 airfoil at zero degrees incidence are presented for a range of Mach and Reynolds numbers. At Reynolds number 10,000, the flow around the airfoil is found to be dominated by vortex shedding from an unstable wake. Frequencies are found to collapse using a Strouhal number based on trailing edge...
conference paper 2006
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Sandberg, R.D. (author), Sandham, N.D. (author)
This paper presents two-dimensional direct numerical simulations (DNS) of noise generated at trailing edges (TE) with zero thickness. The simulations are conducted specifying either no-slip or slip walls in order to investigate viscous effects. In both cases, small amplitude disturbances are introduced close to the inflow boundary that serve as...
conference paper 2006
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Stoevesandt, B. (author), Shishkin, A. (author), Peinke, J. (author), Wagner, C. (author)
Since the accuracy of the widely used Reynolds Averaged Navier Stokes (RANS) approach is limited simulating turbulent flow separation on airfoils, we applied a spectral/hp element method to predict the turbulent flow separation at an airfoil for an angle of attack of 12°. The spectral/hp approach allows to solve the incompressible Navier-Stokes...
conference paper 2006
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