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Başkaya, A.O. (author), Hickel, S. (author)
A conservative cut-cell immersed boundary (IB) method including gas-surface interactions (GSI) for the simulation of atmospheric entry flows under thermochemical nonequilibrium (TCNE) conditions is presented. The performance<br/>of the method is demonstrated for three test cases: a compression ramp, a cylinder, and a plasma wind tunnel ablator...
conference paper 2023
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Hobeika, N. (author), Garcia Sanchez, C. (author), Bluyssen, P.M. (author)
The corona pandemic accelerated a lot of studies about aerosol dispersion and different aerosol-generating tasks ranging in intensity from sneezing to breathing. Both measurements and numerical simulations were used to understand the behaviour of aerosols. For numerical simulations, Computational Fluid Dynamic (CFD) simulations were used;...
conference paper 2023
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Raghavan, V. (author), Simonetti, Irene (author), Lavidas, G. (author), Metrikine, A. (author), Cappietti, Lorenzo (author)
Utilization of Boundary Element Method (BEM) based on linear potential flow for modelling Oscillating Water Column (OWC) devices has gained popularity in the last two decades. The commercial BEM solver WAMIT has been used widely for modelling OWCs and validated using experimental modelling (Delauré et. al. 2003, Bingham et. al. 2015, Faÿ 2020)....
conference paper 2023
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Yildiz, B. (author), Uijttewaal, W.S.J. (author)
Compound weirs are used as flow diversion structures by adding additional flow resistance to the anticipated regions at the rivers. Furthermore, they are used for measuring and regulating flow rates accurately over a wide range of flow depths. When they are used for this purpose, the cross sections are generally selected as symmetrical having...
conference paper 2023
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Kirichek, Alex (author), Cronin, Katherine (author), de Wit, Lynyrd (author), Meshkati, Ebi (author), Pennekamp, Johan (author), Wijdeveld, Arjan J. (author), Sloff, C.J. (author)
Water Injection Dredging (WID) has been successfully applied for removing sediment deposits in reservoirs, which results in an increase of their storage capacity. This dredging method is based on the fluidization of the top sediment layer by pressurized injection of water by a dredging vessel. The fluidized sediment can be transported towards...
conference paper 2022
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Fehrs, Michael (author), Ritter, Markus (author), Helm, Sebastian (author), Mertens, C. (author)
The Pazy Wing test case is a benchmark for the investigation of aeroelastic effects at very large deflections. Tip deformations in the order of 50% span were measured in wind tunnel tests, which renders this model highly attractive for the validation of numerical aeroelastic methods and tools for geometrically nonlinear, large deflection...
conference paper 2022
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Yildiz, B. (author), Uijttewaal, W.S.J. (author), Bricker, J.D. (author), Mosselman, E. (author)
Weirs are flow control structures that can be used for flow diversion purposes. They are classified according to section geometry or their length in the flow direction. For sharp-crested rectangular weirs, Rehbock [1] derived stage-discharge equations. In contracted geometries, streamlines curve at the approach flow leading to variations in flow...
conference paper 2021
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Zou, P. (author), Bricker, J.D. (author), Uijttewaal, W.S.J. (author)
A submerged floating tunnel’s (SFT) cross-sectional geometry is one of the main factors influencing its hydrodynamic characteristics. Minimizing the drag and lift is important for reducing the displacement of the structure and load on the mooring system. In this study, a parametric cross-section design method based on the Bézier curve is used...
conference paper 2020
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Klapwijk, M.D. (author), Lloyd, Thomas (author), Vaz, Guilherme (author), van Terwisga, T.J.C. (author)
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conference paper 2019
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Veldman, Arthur E.P. (author), van der Plas, Peter (author), Seubers, Henk (author), Hosseini Zahraei, S.M. (author), Chang, X. (author), Wellens, P.R. (author), Helder, Joop (author)
conference paper 2019
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Schouten, T.D. (author), Keetels, G.H. (author), van Rhee, C. (author)
In dredging applications, deep sea mining and land reclamation projects typically large amounts of sediments are transported through pipes in the form of hyper concentrated (40% sediment or more) sediment-water mixtures or slurry. These slurries can flow at three different regimes. 1: fully suspended (homogeneous and stratified) 2: partially...
conference paper 2019
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Gangoli Rao, A. (author), Sharma, A. (author), van Dijk, R.E.C. (author)
The Advisory Council for Aeronautics Research in Europe (ACARE) has set an ambitious array of objectives to be accomplished by 2050 for civil aviation. It is often claimed that complying with those targets will not require evolution but, rather, revolution. If the growth in aviation has to be sustained in the future, then we must come up with...
conference paper 2017
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Pini, M. (author), de Servi, C.M. (author), Burigana, M. (author), Bahamonde, Juan S. (author), Rubino, A. (author), Vitale, S. (author), Colonna, Piero (author)
High temperature Organic Rankine Cycles power systems of low power capacity, i.e. 3-50 kW<sub>e</sub>, are receiving recognition for distributed and mobile energy generation applications. For this type of power plants, it is customary to adopt a radial-turbine as prime mover, essentially for their ability to cope with very large volumetric...
conference paper 2017
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Rubino, A. (author), Pini, M. (author), Colonna, Piero (author)
Currently, turbomachinery design optimization methodologies are mainly restricted to steady state approaches, due to the high computational cost associated with time-accurate shape optimization algorithms. However, the possibility to include unsteady effects in turbomachinery optimization can significantly increase the level of accuracy of...
conference paper 2017
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Veldman, AEP (author), Luppes, R (author), van der Plas, P (author), van der Heiden, HJL (author), Duz, B. (author), Seubers, H. (author), Helder, J. (author), Bunnik, T (author), Huijsmans, R.H.M. (author)
During the development of the ComFLOW simulation method many challenges have to be tackled concerning the flow modelling and the numerical solution algorithm. Examples hereof are wave propagation, absorbing boundary conditions, fluid–solid body interaction, turbulence modeling and numerical efficiency. Some of these challenges will be discussed...
conference paper 2016
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Denies, L. (author), Zandbergen, B.T.C. (author), Natale, P. (author), Ricci, D. (author), Invigorito, M. (author)
Methane is a promising propellant for liquid rocket engines. As a regenerative coolant, it would be close to its critical point, complicating cooling analysis. This study encompasses the development and validation of a new, open-source computational fluid dynamics (CFD) method for analysis of methane cooling channels. Validation with...
conference paper 2016
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Florentie, L. (author), Van Zuijlen, A.H. (author), Bijl, H. (author)
This paper is the starting point for the development of a multi-fidelity modeling approach for vortex generators (VG) arrays, where a fully resolved VG model will be coupled with an approximate model in order to improve both accuracy and flexibility without increasing the required computational cost. As a first step thereto, an analysis of the...
conference paper 2014
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Toxopeus, S.L. (author)
In the SIMMAN 2008 workshop, the capability of CFD tools to predict the flow around manoeuvring ships has been investigated. It was decided to continue this effort but to extend the work to the flow around ships in shallow water. In this paper, CFD calculations for the KLVCC2 are presented. The aim of the study is to verify and validate the...
conference paper 2011
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van Rhee, C. (author)
conference paper 2010
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Horsten, B.J.C. (author), Veldhuis, L.L.M. (author)
Renewed interest in propeller propulsion on aircraft configurations combined with higher propeller loads lead to the question how the effects of the propulsion on model support disturbances should be accounted for. In this paper, the determination of engine power effects on support interference of sting-mounted models is demonstrated by a...
conference paper 2009
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