Searched for: author:"Booij, R."
(1 - 20 of 22)

Pages

document
Hoan, N.T. (author), Stive, M.J.F. (author), Booij, R. (author), Hofland, B. (author), Verhagen, H.J. (author)
This paper presents the results of an experimental study on stone stability under nonuniform turbulent flow, in particular expanding flow. Detailed measurements of both flow and turbulence and the bed stability are described. Than various manners of quantifying the hydraulic loads exerted on the stones on a bed are extensively reviewed and...
journal article 2011
document
Hoan, N.T. (author), Booij, R. (author), Hofland, B. (author), Stive, M.J.F. (author), Verhagen, H.J. (author)
The current research is aimed at evaluating the applicability of a numerical flow model to predict bed damage. First, an experimental study was carried out to get more inside into the relation between flow forces acting on a bed and the bed response (damage). The experiments were then used as the basis for the evaluation. Second, the flow was...
conference paper 2008
document
Hoan, N.T. (author), Booij, R. (author), Stive, M.J.F. (author), Verhagen, H.J. (author)
The velocity and turbulence distributions of decelerating open-channel flow in a gradual expansion were measured using LDV equipment. The results show that the logarithmic law can describe the mean velocity in the bottom region well while the Coles’ law can be applied to the outer region. The shear velocity can be determined both by the...
conference paper 2007
document
Hoan, N.T. (author), Booij, R. (author), Hofland, B. (author), Stive, M.J.F. (author), Verhagen, H.J. (author)
The current research is aimed at finding a proper relation between flow forces acting on the bed and the bed response. To this end, experiments were carried out in which both the bed response (quantified by a dimensionless entrainment rate) and the flow field (velocity and turbulence intensity distributions) are measured. The three available...
conference paper 2007
document
Hoan, N.T. (author), Booij, R. (author), Hofland, B. (author), Stive, M.J.F. (author), Verhagen, H.J. (author)
The current research is aimed at finding a dimensionless stability parameter for non-uniform flow in which the effect of turbulence is incorporated. To this end, experiments were carried out in which both the bed response (quantified by a dimensionless entrainment rate) and the flow field (velocity and turbulence intensity distributions) are...
conference paper 2007
document
Booij, R. (author)
Deze notitie beschrijft de resultaten van een inleidend onderzoek naar de mechanismen van de erosie van de basislaag onder geometrisch open filters. Hierbij wordt in eerste instantie uitgegaan van de beter onderzochte erosie van de bodem van een waterloop zonder beschermende filterlaag. Op basis van metingen van Van Os (1998) in een inleidend...
report 1998
document
Booij, R. (author), Tukker, J. (author)
De huidige generatie van Laser-Doppler-meetapparatuur maakt een gedetailleerde, ongestoorde meting van vloeistofsnelheden mogelijk, ook in situaties en geometrieën die vroeger niet goed voor snelheidsmetingen toegankelijk waren. In het Laboratorium voor Vloeistofmechanica is een nieuw Laser-Doppler-systeern beschikbaar. Met dit systeem is het...
report 1994
document
Booij, R. (author), Melis, L.M.M. (author)
This report is essentially a report of the measurements in the carousel of the laboratory for Fluid Mechanics of the Delft University of Technology made accessible for a slightly wider public. A comprehensive documentation about the considered investigation, both concerning the theoretical background and concerning the elaboration of the...
report 1994
document
Booij, R. (author)
Annular flumes are used for studying erosion and/or deposition of cohesive sediments in the laboratory. These flumes have advantages over straight recirculating flumes in that effects of inflow and outflow conditions are avoided and that there are no pumps which break down the suspended flocculated sediment. A disadvantage of annular flumes is...
report 1994
document
Hoffmans, G.J.C.M. (author), Booij, R. (author)
Excessive local scour can progressively undermine the foundation of a structure. Because complete protection against scour is too expensive generally, the maximum scour-depth and the upstream slope of the scour hole have to be predicted to minimize the risk of failure. In 1961 a systematical research 'tY'ith respect to scour holes started in the...
conference paper 1993
document
Booij, R. (author)
Stochastische beschrijving van de turbulentie, basisvergelijkingen, energie, turbulente afschuifstroming, turbulente stromingen in de praktijk, modellering van de turbulentie, turbulente diffusie.
lecture notes 1992
document
Booij, R. (author)
Literatuuroverzicht.
report 1987
document
Booij, R. (author)
Dit rapport is een verslag van een experimenteel onderzoek betreffende de waterbeweging in havens aan een rivier. Het onderzoek is uitgevoerd in de periode van mei t/m oktober 1986 in een hiertoe ontworpen goot in het Laboratorium voor Vloeistofmechanica van de Faculteit der Civiele Techniek van de Technische Universiteit Delft. Het onderzoek is...
report 1986
document
Booij, R. (author), Yu, X.Q. (author)
De sedimentatie in een haven wordt o.a. bepaald door de wateruitwisselingen door de havenmond en de stromingspatronen in de haven. Dit onderzoek beperkt zich in hoofdzaak tot het geval van door entrainment (meeslepen) van water uit het havenbekken in de menglaag tussen de rivier en het havenbekken veroorzaakte uitwisseling. Afgezien wordt van...
report 1986
document
Booij, R. (author)
Stochastische beschrijving van turbulentie, basisvergelijkingen, energie, turbulente afschuifstoming, turbulente stromingen in de practijk, modellering van de turbulentie, turbulente diffusie.
lecture notes 1986
document
Booij, R. (author)
Onderzoek naar uitwisselingsdebieten door entrainment in havenbekkens.
report 1986
document
Booij, R. (author), Pennekamp, J.G.C. (author)
Prediction of bottom changes in rivers and tidal channels require a thorough knowledge of the secondary flow, as this flow gives rise to bottom slopes transverse to the main flow direction. In the model used in this research, the computation of the secondary flow field is based upon an, independently computed, depth averaged main flow field. In...
report 1984
document
Pennekamp, J.G.S. (author), Booij, R. (author)
For the computation of depth averaged flows in tidal channels and rivers a recently developed fully implicit finite difference method of the ADI-type proved vastly superior to the partly explicit variants, commonly used. The fully implicit variant allowed a relatively large time step in combination with arealistic lateral diffusion coefficient....
report 1984
document
Pennekamp, J.G.S. (author), Booij, R. (author)
In order to make predictions for the morphology of an alluvial bottom a thorough knowledge of the flow pattern is needed. In tidal channels, without a nett discharge over the tidal period, the main flow effects on the morphology will, on an average, remain relatively small because of the tidal variation. Therefore second order flow phenomena...
report 1983
document
Booij, R. (author), Pennekamp, J.G.C. (author)
Knowledge of the secondary flow is essential for predictions about the morphology of alluvial bottoms in tidal channels. In this research the determination of the secondary flow is based on a known depth averaged velocity field. The depth averaged velocities must be computed with a high accuracy in order to make possible a reasonable...
report 1983
Searched for: author:"Booij, R."
(1 - 20 of 22)

Pages