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Maggi, F. (author)The optical measurements of flocs foreseen in the settling column are 2-D projections of 3-D fractal structures formed in a turbulent environment by means of aggregation and break-up processes. Based on numerical analysis, the resulting structures appear non-homogenous fractals with a full spectrum of fractal dimensionalities, MAGGI(2002). The...report 2003
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Kranenburg, C. (author)The Prandtl mixing-length model of turbulent exchange of mass and momentum is applied to calculate the entrainment of overlying water into a layer of suspended fine sediment at a horizontal bed. In the field the flow and turbulence in such a concentrated benthic suspension (CBS) are driven by a streamwise pressure gradient resulting from the...report 1999
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Visser, P.J. (author), Smit, M.J. (author), Snip, D.W. (author)Beschrijving van de meetopstelling en de meetresultaten van het zwin 1994 experiment alsmede de inhoud van het Zwin 1994 archief.report 1996
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Hoffmans, G.J.C.M. (author)Flume experiments with small Froude numbers have been carried out to study the concentration field in a local scour hole without supply of sediment load. The measuring results will be used to check the validity of the two dimensional scour model DUCT-SUSTRA. The objective of the experiments was to measure the concentrations at various locations...report 1990
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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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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)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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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