Searched for: faculty%3A%22Civil%255C%252BEngineering%255C%252Band%255C%252BGeosciences%22
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Smit, P.B. (author), Janssen, T.T. (author), Herbers, T.H.C. (author)
Refractive focusing of swell waves can result in fast-scale variations in the wave statistics because of wave interference, which cannot be resolved by stochastic wave models based on the radiative transport equation. Quasi-coherent statistical theory does account for such statistical interferences and the associated wave inhomogeneities, but...
journal article 2015
document
Smit, P.B. (author), Janssen, T.T. (author)
The interaction of ocean waves with variable currents and topography in coastal areas can result in inhomogeneous statistics because of coherent interferences, which affect wave-driven circulation and transport processes. Stochastic wave models, invariably based on some form of the radiative transfer equation (or action balance), do not account...
journal article 2013
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Van der Toorn, A. (author), Van der Wiel, W.D. (author), De Rooij, M. (author), Janssen, H. (author), Kiljan, D.J. (author)
conference paper 2013
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Smit, P.B. (author), Janssen, T.T. (author), Herbers, T.H.C. (author)
Refraction of narrow-band surface waves in coastal areas can result in wave-focal zones where due to interference, wave statistics vary rapidly and on similar length scales as those of individual waves. However such interference patterns, or wave coherence, are not accounted for in conventional stochastic wave models that are based on the energy...
conference paper 2012
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Smit, P.B. (author), Janssen, T.T. (author), Herbers, T.H.C. (author)
Refraction of narrow-band surface waves in coastal areas can result in wave-focal zones where due to interference, wave statistics vary rapidly and on similar length scales as those of individual waves. However such interference patterns, or wave coherence, are not accounted for in conventional stochastic wave models that are based on the energy...
conference paper 2012
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Janssen, A.N. (author), van der Graaf, J. (author)
journal article 2012
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Grünewald, S. (author), Janssen, B. (author), Schipper, H.R. (author), Vollers, K.J. (author), Walraven, J.C. (author)
This paper discusses the effect of intentional deformation of a flexible formwork after casting of the concrete and the influence of the characteristics of concrete in the fresh state on the quality of a concrete element. This deformation is intended to bring the concrete element in its desired final shape; the deformation typically takes place...
conference paper 2012
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Grunewald, S. (author), Janssen, B. (author), Schipper, H.R. (author), Vollers, K.J. (author), Walraven, J.C. (author)
This paper discusses the effect of intentional deformation of a flexible formwork after casting of the concrete and the influence of the characteristics of concrete in the fresh state on the quality of a concrete element. This deformation is intended to bring the concrete element in its desired final shape; the deformation typically takes place...
conference paper 2012
document
Smit, P.B. (author), Janssen, T.T. (author)
Wave fields traveling through a varying medium (e.g. topography, currents), can develop well-defined focal zones and caustics, where the wave field is highly coherent and wave statistics vary rapidly. However, the presence and evolution of such coherent structures in the wave field are not resolved in a quasi-homogeneous description of the wave...
conference paper 2011
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Schipper, H.R. (author), Janssen, B. (author)
Free form architecture with complex geometry brings along new challenges for manufacturers of building components. This paper describes the application of structural mechanics to predict the behaviour of an elastic mould surface, used as formwork for the manufacturing of double curved panels in precast concrete. Results are presented of...
conference paper 2011
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Schipper, H.R. (author), Janssen, B. (author)
Free form architecture with complex geometry brings along new challenges for manufacturers of building components. This paper describes the application of structural mechanics to predict the behaviour of an elastic mould surface, used as formwork for the manufacturing of double curved panels in precast concrete. Results are presented of...
journal article 2011
document
Schipper, H.R. (author), Janssen, B. (author)
The manufacturing of double-curved precast concrete elements is still expensive, due to the high costs and limited possibilities for repetitive use of the moulds or formwork. The goal of the research described in this paper is to develop a production method that overcomes these difficulties by enabling the mould to be reused many times and by...
conference paper 2011
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Janssen, A.N. (author)
doctoral thesis 2011
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Janssen, T.T. (author), Herbers, T.H.C. (author), Battjes, J.A. (author)
We present a stochastic model for the evolution of random ocean surface waves in coastal waters with complex seafloor topography. First, we derive a deterministic coupled-mode model based on a forward scattering approximation of the nonlinear mild slope equation; this model describes the evolution of random, directionally spread waves over fully...
journal article 2008
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Van Dongeren, A. (author), Battjes, J.A. (author), Janssen, T. (author), Van Noorloos, J. (author), Steenhauer, K. (author), Steenbergen, G. (author), Reniers, A. (author)
The growth rate, shoreline reflection, and dissipation of low?frequency waves are investigated using data obtained from physical experiments in the Delft University of Technology research flume and by parameter variation using the numerical model Delft3D?SurfBeat. The growth rate of the shoaling incoming long wave varies with depth with an...
journal article 2007
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Janssen, T.T. (author)
As ocean surface waves radiate into shallow coastal areas and onto beaches, their lengths shorten, wave heights increase, and the wave shape transforms from nearsinusoidal to the characteristic saw-tooth shapes at the onset of breaking; in the ensuing breaking process the wave energy is cascaded to small-scale turbulent motions in the surf zone....
doctoral thesis 2006
document
Janssen, T.T. (author), Herbers, T.H.C. (author), Battjes, J.A. (author)
journal article 2006
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Schokking, L.A. (author), Janssen, P.C. (author), Verhagen, H.J. (author)
The stability of stones in propeller-induced jet wash is still difficult to predict. Especially the trend of bowthrusters increasing in size and power in sea going ships (especially ferries) over the last years may be a reason for concern when dealing with the protection of slopes and beds. But also ships used in inland navigation are using...
journal article 2003
document
Hendriks, Ch.F. (author), Janssen, G.M.T. (author)
journal article 2001
document
Hendriks, Ch.F. (author), Janssen, G.M.T. (author)
journal article 2001
Searched for: faculty%3A%22Civil%255C%252BEngineering%255C%252Band%255C%252BGeosciences%22
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