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- Khalil, M. (author), Wesseling, P. (author) journal article 1992
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ten Dam, A.A. (author), Dieleman, P. (author)This report describes the results of an evaluation of numerical integration schemes to be used for the digital simulation of second order ordinary differential equations (ODE's) which are characteristic for multibody systems such as space manipulators. The study focuses on dedicated schemes for this type of systems. Main attention is paid to the...report 1990
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- Van der Beek, C.G.A. (author) doctoral thesis 1989
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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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Noback, R. (author)A method is described to generate a random Gaussian process with a power spectrum with fractional power, for example the von Karman spectrum for atmospheric turbulence. The method uses digital filtering of a white noise process and it is based on the use of fractional derivatives. An algorithm to generate the process is presented.report 1988
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- De Borst, R. (author) journal article 1987
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Boerstoel, J.W. (author)An analysis of various alternative approaches in grid generation is presented. A grid-generation procedure for complex aircraft configurations could be based on a combination of three subprocesses, . decomposition of the flow domain into about 100 hexahedronal blocks, . trilineair transfinite interpolation to generate initial grid point...report 1986
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Hoogendoorn, R.A. (author)Computations in numerical fluid dynamics create large sets of data. Transmission of these datasets requires a high speed communication link or, alternatively, the use of data compression techniques. This report describes the results of a study to the applicability of data compression techniques. An algorithm is designed that yields favourable...report 1986
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- Hemker, P.W. (author), Wesseling, P. (author), De Zeeuw, P.W. (author) conference paper 1984
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Blom, H.A.P. (author)The problem considered is filtering for Gaussian observations of linear differential systems that are driven by both Wiener processes and marked Poisson point processes. Well-known representations of the MMSE-filter for such a Markov jump-diffusion are a differential for the evolution of its conditional density or differentials for all its...report 1982
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Lindhout, J.P.F. (author), van den Berg, B. (author), Elsenaar, A. (author)At the workshop nine participants presented the results of their calculations for a practical test case. The test case deals with the 3D turbulent boundary layer development, including separation, on the root section of a swept wing. The employed calculation methods comprise 3D integral methods as well as field methods. A short description of...report 1981
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van der Vooren, J. (author), Huizing, G.H. (author), van Essen, A. (author)A calculation method, based upon transonic small perturbation theory, is presented for the transonic flow about a semi-wing. The influence of a body can be simulated by prescribing appropriate transverse velocities in a vertical plane through the wing root. Due to the small perturbation assumption the wing should be thin and have little dihedral...report 1981
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Vaatstra, W. (author), Veldman, A.E.P. (author), van der Vooren, J. (author)The method of Glowinski, Periaux and Pironneau for the calculation of transonic flow, which is based on the constrained minimization of a cost function, is critically evaluated for a case in which the transonic small perturbation equation is used. The resulting minimization problem is discretized in finite element form and solved using a...report 1980
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Boerstoel, J.W. (author)In this study, an algorithm for the computational design of supercritical shock-free aerofoils is developed and analyzed with hodograph theory. Such an algorithm may be based on the combination of two approaches for the construction of solutions of the flow equations for shock-free transonic flow. In the first approach, such solutions are...report 1977
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- Maiwald, K.D. (author) report 1976
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- Rees, A.J. van (author) report 1976
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Lindhout, J.P.F. (author), de Boer, E. (author)A method is presented to compute the 3D compressible turbulent boundary layer on an adiabatic wall under infinite swept wing conditions. The mathematical model of turbulence is based on a generalisation of Bradshaw's 2D shear stress equation. This results in a system of 5 equations valid along 5 distinct characteristics. A brief discussion is...report 1975
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- report 1974
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- Rees, A.J. van (author) report 1974
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Boerstoel, J.W. (author), Huizing, G.H. (author)A design method for transonic shock-free aerofoils using analytic hodograph theory is sketched. A user-oriented outline of the program system that has been developed is presented. A number of examples of computed aerofoils show that the performance of the program system seems to be sifficient for advanced transonic shock-free aerofoil design.report 1973