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Stelling, G.S. (author), Wang, L.X. (author)An unsteady, separating flow with a free surface was investigated with a physical model and a numerical model. To simulate tidal flow, the prescribed flow rate at the inflow boundary was a half-period sine function of time. Measurements of velocities and wave heights were conducted by using LDV and a wave-height meter in a straight open channel...report 1984
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Van Kleef, E.A. (author)Aan een stationaire stroming in een laboratoriumgoot met een plotselinge zijdelingse verwijding (expansieverhouding 1,5) zijn metingen gedaan met behulp van een Laser-Doppler Anemometer. De ruwheid van de bodem is gevarieerd. Gemeten zijn de gemiddelde snelheden, in longitudinale en in transversale richting, de Reynoldsspanning en de kinetische...master thesis 1983
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- Arnold, Allan J. (author) conference paper 1982
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Vitale, P. (author)Three-dimensional movable-bed laboratory tests were conducted to compare radiaton stress and energy flux factor as predictors of the longshore sediment transport rate. The tests were performed in the U.S. Army Coastal Engineering Research Center's (CERC) Shore Processes Test Basin (SPTB). This report presents derivations of the radiaton stress...report 1981
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Koppel, T. (author)Experiments on unsteady separating flow past a sudden expansion in an open channel are described. To simulate tidal flow the flow rate in the approach channel varied as a half-sine with time. Different visualization techniques to obtain an insight into the behaviour of the separating vortex in time and space were used. Laser-Doppler velocimetry ...report 1981
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Atkins, R. (author)The use of a small two-component electromagnetic current meter to record turbulent velocities in a laboratory flume is described. The results from these experiments are compared with results obtained previously using different measuring techniques.report 1980
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De Vriend, H.J. (author)This report describes an extensive experiment on steady turbulent flow in a rather sharply curved U-shaped flume with a shallow rectangular cross-section, under almost the same conditions as earlier, less extensive measurements in the same flume. The experiment was carried out as a part of a research project aiming at a mathematical model of the...report 1979
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Veldman, A.E.P. (author)In this report a mathematical model is presented which can describe the dynamic behaviour of liquids in partially filled containers under low gravitational conditions. This model will be used for the evaluation of a series of experiments which the NLR has planned to be performed onboard Spacelab. Furthermore, the report contains a description of...report 1979
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Pat, M.G.M. (author), Fontijn, H.L. (author), Reinhardt, H.W. (author), Stroeven, P. (author)Binnen dit onderzoek wordt onder erosie het afslijten van een oppervlak door water en de daarin meegevoerde sedimenten verstaan. Bij bouwwerken in zee kan erosie een verschijnsel van aantasting zijn als water met zand en slib regelmatig langs de konstruktie heen en weer stroomt. De bouw van de pijlerdam in de Oosterschelde was de aktuele...report 1979
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De Vriend, H.J. (author)After the study of fully developed and developing steady laminar flow in curved channels of shallow rectangular wet cross-section (see earlier reports in this series), steady turbulent flow in such channels is investigated as a next step towards a mathematical model of the flow in shallow river bends. A mathematical model is developed for this...report 1979
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- Ensing, G. (author), Bosch, M.S. (author) report 1979
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De Vriend, H.J. (author)As an intermediate step between earlier investigations on fully developed laminar flow in curved channels of shallow rectancular wet cross-section and the mathematical modeling of turbulent flow in river bends, a mathematical model of developing laminar flow in such channels is investigated. The most important assumptions made in addition to...report 1978
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- Snel, H. (author), Lindhout, J. (author), Merck, W. (author), Houben, J. (author) report 1975
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Wewerinke, P.H. (author)A theoretical and experimental program was conducted to study human response characteristics in a variety of single- and dual-axis control situations. The object was to build and support a human control effort model. The aspect of human controller's effort is indispensable for a complete description and prediction of human operator behavior and...report 1974
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De Vriend, H.J. (author)Het probleem van de stroming in een rivierbocht is door ir. M.B. de Groot geabstraheerd tot het probleem van de stroming in een cilindrische bak met verticale as, afgesloten met een om die as draaiend, vlak deksel. Een nadeel van de bovengenoemde abstractie is, dat men overgaat op een fundamenteel ander aandrijvend mechanisme: de schuifspanning...report 1971
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- Makov, Y.L. (author) conference paper 1970