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Jensen, J.A. (author)It is described why, and to what extent the practicing engineer makes use of model tests in his design of rubble mound breakwaters. Furthermore an example is shown from practice illustrating the application of models for investigation of wave penetration into harbours. Especially the way in which model tests can confirm and supplement...conference paper 1969
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Lebreton, J.C. (author), Cormault, P. (author)This memorandum proposes a mathematical approach of the interactions between a non-viscous fluid with a free surface and an assembly of structures composed of shells, whether fixed or not, partially or totally immersed in the fluid. Some fundamental aspects of the problem, such as the effects of the free surface and of the mutual influence of...conference paper 1969
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d' Angremond, K. (author), van Oorschot, J. (author)Wind-wave flumes have been added to the laboratory facilities since a long time, in order to simulate natural wind lv-aves. Most wind-wave flui'nes have been equipped in addition with mechanical (regular) wave generators to avoid extreme small model scales. For some time past a programmed (irregular) wave generator has been installed in one of...conference paper 1969
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Ferguson, H.A. (author)The hydraulic model is playing an increasing part in the process of hydraulic designing and it seems even to have taken over the dominant position that experience and tradition had held for such a long time. But, however important the model tests have become, they are not the only means available to the designer, nor does he have to rely solely...conference paper 1969
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de Jong, J. (author)On March 24, 1969, the new wind-wave flumes at the Delft Hydraulics Laboratory (Figures 5 and 6) were officially opened by the Director-General of the Rijkswaterstaat. The design work started in 1964, and the building and installations 1tlere completed in November 1968. A general description of this equipment and some insight into its underlying...conference paper 1969
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Zhu, Haiwei (author), Yu, Hongfa (author), Ma, Haiyan (author), Da, Bo (author), Mei, Qiquan (author), Yang, Liming (author)For elaborating the research significance, goal, content and representative results of the concrete marine field exposure experiments all over the world, we have collected a large number of research literature since 1905. The longest exposure test for concrete has reached 62 years and, most importantly, concrete exposure experiments have made...conference paper
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Jürgenhake, B. (author)Workshop 3. Session 3.3: Expression and taste Abstract: Dwelling has boundaries, filters from the inside to the outside. The facade, the skin of the dwelling, is a sensitive part of the house. It has many functions to fulfill: the face of the home as a face to the public, the physical filter and the psychological membrane of the home as well....conference paper 2005
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Panara, D. (author), Porta, M. (author), Schoenfeld, T. (author)The use of wall functions has been investigated for LES and URANS numerical simulation in pulsating and oscillating channel flow applications. The results show that the wall function approach is accurate in the so-called quasi-steady regime but there are discrepancies with the experimental results in the intermediate frequency range. A special...conference paper 2006
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Li, A. (author), Norinaga, K. (author), Deutschmann, O. (author)Numerical simulation of materials synthesis based on detailed models for the chemical kinetics and transport processes is expected to support development and optimization of production processes. Exemplarily, chemical vapor deposition and infiltration of pyrolytic carbon for the production of carbon fiber reinforced carbon is studied by recently...conference paper 2006
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Guo, Y. (author), Zhang, L. (author), Zhang, J. (author)This paper reports the results from a turbulent numerical modelling study on the free overfall in a rectangular channel. A wide range of model parameters (i.e. discrete square bar bed roughness, channel slope, and incoming upstream Froude number) is investigated. The water surface profiles, velocity fields and end-depth are simulated and...conference paper 2006
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Spivakovskaya, D. (author), Deleersnijder, E. (author), Heemink, A.W. (author)Large scale diffusion processes in the ocean occur mostly along isopycnal surfaces, i.e. surfaces of equal density. However, there is also diapycnal diffusion, which is associated with a diffusion flux orthogonal to isopycnal surfaces. The diapycnal and isopycnal diffusion fluxes are commonly parameterized a la Fourier-Fick, a formulation...conference paper 2006
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Vierendeels, J.A. (author)The paper describes a new and powerful technique to solve strongly coupled fluid-structure interaction (FSI) problems with partitioned solvers. In order to achieve strong coupling approximate Jacobians of the fluid and structural solvers have to be known. In the proposed method the response to applied displacement and pressure modes are used to...conference paper 2006
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Knopp, T. (author)A universal wall-function method for RANS turbulence modelling is presented, which is designed by consistency between the global turbulence model and the near-wall model. This ensures solutions independent of the wall-distance of the first grid node above the wall provided it is located in the logarithmic part of the boundary layer or below. The...conference paper 2006
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Meyers, J. (author), Sagaut, P. (author)A theoretical analysis is presented on the dependence of the standard and variational multi-scale Smagorinsky models on the proximity of the LES filter width Delta to the integral length scale of turbulence L on the one hand, and to the Kolmogorov scale eta on the other hand. Moreover modifications of the models are formulated, which respond...conference paper 2006
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Yakovenko, S.N. (author), Chang, K.C. (author)In the present study, the surface tension is introduced as volume forces according to the continuum surface force (CSF) model [1] using the surface tension coefficient and the mollified volume fraction (color) function. The latter can be taken in the first approximation as the volume fraction defined numerically due to (possible) smoothing of...conference paper 2006
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Trias, F.X. (author), Soria, M. (author), Oliva, A. (author), Verstappen, R.W.C.P. (author)Since direct numerical simulations (DNS) of natural convection in a differentially heated cavity can not be performed at high Ra-numbers, a dynamically less complex mathematical formulation is sought. In the quest for such a formulation, we consider regularizations (smooth approximations) of the nonlinearity. The regularization method basically...conference paper 2006
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Titarev, V.A. (author)Model kinetic equations are often used to describe rarefied gas flows in the broad range of flow regimes. Accurate model kinetic equations were proposed by Shakhov [1] for monatomic gases and by Rykov [2] for diatomic gases. The main advantage of these model equations over other models reported in the literature is that the model collision...conference paper 2006
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Blanquet, E. (author), Chaussende, D. (author), Nishizawa, S. (author), Pons, M. (author)Over the last twenty years, processes which lead to materials synthesis from a gaseous phase constitute an important technology in many applications fields such as microelectronics or protective coating industry. Due to the complexity of the involved phenomena, computational modeling had been required to improve technological processes and help...conference paper 2006
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Ayub Akhtar, M. (author), Sohaib, M. (author), Rafique, M. (author)A time dependent Computational Fluid Dynamics analysis of gas jets impinging onto liquid pools has been conducted. The aim of the study is to obtain a better understanding of highly complex, and industrially relevant flows in jetting system. Three different multiphase models, i.e., The Eulerian model, the volume of fluid model and the mixture...conference paper 2006
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Raisee, M. (author), Jafari, A. (author)This paper discusses the abilities of two different low-Reynolds-number eddy-viscosity models in resolving the complex physical features that arises in turbulent flows around a square cylinder at Re=22000. For the modeling of turbulence, the Launder & Sharma (LS) [1] and Kawamura & Kawashima (KK) [2] low-Re models have been employed. The present...conference paper 2006