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Okayasu, A. (author)The characteristic motion of water under breaking waves and the turbulence structure in the surf zone were investigated through detailed two-dimensional velocity measurements in a wave flume. Significant difference was found between the breaking processes in the outer and inner regions of the surf zone. The velocity field in each region consists...report 1989
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- Mierlo, M.C.L.M. van (author), Ruiter, J.C.C. de (author) report 1988
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Wang, X.K. (author)Experiments to measure forces on objects in open channel flow behind a bacward facing stepreport 1988
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- Pietrzak, J. (author), Kranenburg, C. (author), Abraham, G. (author) report 1988
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- Flokstra, C. (author) report 1988
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Hoffmans, G.J.C.M. (author)The general purpose of this research project is to model mathematically the scour-hole downstream of a structure (2-D). The model has to simulate the development of the scour as a function of time. Basically two models are necessary namely a flow model and a morphological model. The latter has to describe the bed- and suspended load and the...report 1988
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- Abraham, G. (author) report 1986
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- Flokstra, C. (author) report 1986
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Jovic, S. (author), Ramaprian, B.R. (author)An experimental study of the developing two-dimensional turbulent wake behind a streamlined flat-plate is reported. The purpose of this study was to understand the evolution of the wake structure from the one characteristic of the boundary layer to that characteristic of the far-wake, and to investigate whether organized motions are present in...report 1986
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- Uittenbogaard, R.E. (author) report 1986
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Chen, C.J. (author), Singh, K. (author)The use of second order closure turbulence model in predicting turbulent flows is known to be more successful than the classical mixing length model. However, it is found that if the turbulence constants are not altered or modified, the second order closure turbulence model is unable to predict satisfactorily f or some flows such as round jet...report 1985
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Justesen, P. (author)Close to the bottom the no-slip condition will retard the flow and cause a boundary layer to develop. In nature this boundary layer will for most practical purposes be turbulent and the bed will be rough. Usually the boundary layer is confined to a thin layer close to the bed having a typical thickness of 0.2 m under surface gravity waves. The...report 1985
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Kranenburg, C. (author)A k-model is formulated that consists of the turbulent kinetic energy equation and an algebraic expression for the mixing length taking into account the influence of stratification. Applicability of the model is restricted to shallow, nearly horizontal flows. For local-equilibrium flows the model reduces to the well-known mixing-length...report 1985
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Booij, R. (author)For the prediction of dispersion phenomena and of changes in the morphology of an alluvial bottom, a detailed description of the water flow is necessary. The flow in estuaries is a complicated one, partly because of the time-dependence. To isolate this aspect of tidal flow a simplifying one-dimensional (vertical) flow model 1S used. This one...report 1982
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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)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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Noback, R. (author)In this report it is assumed that atmospheric turbulence appears in patches and that within the patches the turbulence can be described.as a modulated Gaussian process. The patch lengths have a certain probability density function. Load exceedance curves and design loads for various aircraft models for this turbulence model are compared with...report 1978
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Nezu, I. (author)Ph.D. thesisreport 1977
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Vreugdenhil, C.B. (author)Interne cursus van het Waterloopkundig Laboratorium over turbulentie, bevat de onderwerpen: -basisvergelijkingen; -statistische beschrijving; -transportprocessen; -wandturbulentie; -tijdsafhankelijke grenslagen; -vrije turbulentie; -nieuwe turbulentietheorien.report 1977