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Hoffmans, G.J.C.M. (author)
In the Netherlands hydraulic engineering structures are not only designed, but are also managed and maintained (M&M). In the nineteen-nineties in the United States during periods of high water scores of bridges collapsed, because American law forbids the use of bed protection around bridge piers and moreover, no maintenance plans were available....
report 2006
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Hofland, B. (author)
report 2002
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Mosselman, E. (author), Akkerman, G.J. (author), Verheij, H.J. (author), Hoffmans, G.J.C.M. (author), Jongeling, T.H.G. (author), Petit, H.A.H. (author)
report 2000
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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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Suastika, I.K. (author)
In this report we present some results of a laboratory pilot study which has been conducted to test a method to artificially enhance the turbulence of a water flow in a laboratory flume. The purpose of this test is to provide data which will be used to verify whether the method is suitable for the study of the dissipative effects of turbulence...
report 1998
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Akkerman, G.J. (author), Verheij, H.J. (author)
report 1998
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Boot, G. (author)
report 1998
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Akkerman, G.J. (author), Verheij, H.J. (author)
report 1998
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Verwey, A. (author), Agtersloot, R.C. (author)
report 1998
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Uittenbogaard, R.E. (author), Hoffmans, G.J.C.M. (author), Akkermans, R.J. (author)
report 1998
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Bijvelds, M.D.J.P. (author)
In this report the water flow in harbours, that are situated on a river, are considered. Due to the flow velocity difference between the river and the harbour, a turbulent mixing layer develops at the harbour entrance. The shallowness of the water induces the coexistance of two disparate turbulent length scales in these regions. Besides the ...
report 1997
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Kester, J.A.T.M. van (author), Uittenbogaard, R.E. (author), Dingemans, M.W. (author)
report 1996
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Rodi, W. (author), Bonnin, J.C. (author), Buchal, T. (author)
This document contains the calculation results for 5 test cases and the description of calculation methods submitted to the ERCOFTAC Workshop on Data Bases and Testing of Calculation Methods for Turbulent Flows held in Karlsruhe from April 3 to 7, 1995. The workshop was an outcome and marked the end of the research project "Data Validation and...
report 1995
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Skare, P.E. (author)
report 1995
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Aswatha Narayana, P.A. (author)
report 1995
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Uittenbogaard, R.E. (author), Imberger, J. (author)
report 1993
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Uittenbogaard, R.E. (author)
report 1993
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Hoffmans, G.J.C.M. (author)
Scour is the lowering of the sea or river-bed as a result of non-equilibrium sediment transport conditions and can be divided into several categories (Breusers and Raudkivi, 1991). Local scour, which may occur at the base of a structure because of the affected flow pattern, can severely endanger the stability of this structure. Many varieties of...
report 1993
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Bernard, R.S. (author), Schneider, M.L. (author)
Without some correction for the interaction between lateral curvature and vertically nonuniform velocity, depth-averaged numerical models cannot predict the gradual migration of high velocity toward the outside of channel bends. Conventional depth-averaging does not account for the curvature-induced secondary flow that gives rise to the...
report 1992
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Lehfeldt, R. (author)
The density distribution within a fluid is of great importance for flow and transport phenomena in geophysical computational fluid dynamics. All turbulent exchange processes are influenced by buoyancy effects and must be adequately considered in numerical models. Parameterizations of the vertical eddy viscosity and eddy diffusivity are presented...
report 1991
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