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van den Berg, B. (author)The turbulence transport equations are reviewed. The role of the pressurestrain term is studied. It is shown that the pressure-strain term exactly cancels the production term when the Taylor hypotVjesis or frozen turbulence approximation holds. The consequences of this result foi[ the interpretation of the turbulence transport equations are...report 1984
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van den Berg, B. (author)Part. I. Text, tables, fig. 1-5 Part. II. Fig. 6-63 (flap blowing results) Part. III. Fig. 64-103 (nose blowing results)report 1965
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van den Berg, B. (author)A literature study has been made of the effect of Reynolds number variations on the stall of wings. It appeared that large changes in maximum lift and type of stall may occur up to very high Reynolds numbers. The nature of these changes varies essentially for airfoils of different thickness and for moderately and highly swept wings. The Mach...report 1969
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- van den Berg, B. (author), Cousteix, J. (author), Fanneløp, T.K. (author), Hirschel, E.H. (author), Smith, P.D. (author) report 1978
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- van den Berg, C.J. (author) report 1999
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Barens, L.M. (author), van Borselen, R.G. (author), Fokkema, J.T. (author), van den Berg, P.M. (author)During marine seismic data acquisition, the data are shot in the so-called end-on configuration, which means that the receivers are positioned only at one side from the source. In marine seismic data processing, the missing offsets at the other side from the source are often reconstructed by applying physical reciprocity, i.e., source- and...report 1995
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van den Berg, B. (author)A theoretical study is made of the flow near the wall in a three-dimensional turbulent boundary layer. An extended law of the wall is derived, which predicts the variation of the magnitude and direction of the velocity close to the wall. Furthermore an experimental investigation is described. Measurements were performed in a three-dimensional...report 1976
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Humphreys, D.A. (author), van den Berg, B. (author), Krause, E. (author), Lindhout, J.P.F. (author)The results of several three-dimensional turbulent boundary layer calculations have been compared with each other and with experiment for a number of test cases. The calculation methods applied range from integral methods to field methods using a turbulence model based upon the Reynolds stress transport equations. The test cases comprise various...report 1985
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van den Berg, B. (author), Piers, W.J. (author), de Boer, E. (author)The attached flow around a swept wing has been calcTilated with allowance for the effects of boundary layer and wake. In part I a swept wing was considered with a turbulent boundary layer on both the upper and lower wing surface. The present part of the study deals with the calculation of the flow around the same swept wing with a laminar...report 1977
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- Houtman, E.M. (author), Bakker, P.G. (author), de Vries, E. (author), van den Berg, J.C. (author) report 1994
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- van den Berg, M. (author) report 2001
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- van den Berg, M. (author) report 2001
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- van den Berg, E.G. (author) report 2012
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- van den Berg, B. (author) 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 Egmond, J.A. (author), van den Berg, B. (author), Labrujere, T.E. (author)At NLR a system for the computational design on multi-element airfoil has been developed. This design system solves the inverse aerodynamic problem in an approximate way. A priori specified aerodynamic requirements (surface pressure distribution) and geometric requirements are minimized in a least-squares way, introducing weight factors to...report 1983
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van den Berg, J.I. (author)In the development of mathematical simulation methods for engineering processes, it is essential to validate the mathematical models. Its results must be compared with results from other calculation methods or measurements. This is especially true in computational fluid dynamics (CFD). It is essential that an engineer developing mathematical...report 1987
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van den Berg, B. (author), Elsenaar, A. (author), Lindhout, J.P.F. (author), Wesseling, P. (author)First a three-dimensional turbulent boundary-layer experiment is described. This experiment has been carried out with the specific aim to provide a test-case for calculation methods. Much attention has been paid to the design of the test set-up. An infinite swept wing flow has been simulated with good accuracy. The initially two-dimensional...report 1974
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- Wittenberg, H. (author), Korting, P.A.O.G. (author), Wijchers, T. (author), Elands, P.J.M. (author), Dijkstra, F. (author), van den Berg, R.P. (author), van den Brand, J. (author) report 1987
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van den Berg, B. (author)An experiment is described on a wing flap configuration, which was so designed that nowhere flow separations occur, apart from a small laminar separation bubble on the wing nose. The measurements comprise surface-pressure measurements, boundary layer and wake traverses, and surface-flow visualizations. Three angles of attack have been applied...report 1979