Searched for: subject%3A%22FD%255C%2B%255C-%255C%2BFluid%255C%2BDynamics%22
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Campagnolo, D. (author), Saraga, D.E. (author), Cattaneo, A. (author), Spinazzè, A. (author), Mandin, C. (author), Mabilia, R. (author), Perreca, E. (author), Sakellaris, I. (author), Canha, N. (author), Mihucz, V.G. (author), Szigeti, T. (author), Ventura, G. (author), Madureira, J. (author), de Oliveira Fernandes, E. (author), de Kluizenaar, Y. (author), Cornelissen, E. (author), Hänninen, O. (author), Carrer, P. (author), Wolkoff, P. (author), Cavallo, D.M. (author), Bartzis, J.G. (author)
article 2017
document
Fransman, W. (author), Pronk, A. (author), Schelvis, R.M.C. (author), Moons, A.M.M. (author)
Although work is good for you, it can actually be bad for your health, too. Poor working conditions are responsible for 5% of the total disease burden1, a percentage that is the same as the figure for the adverse health effects resulting from an unhealthy environment or obesity. After smoking, these three factors are responsible for the major...
other 2017
document
Fransman, W. (author), Pronk, A. (author), Schelvis, R.M.C. (author), Moons, A.M.M. (author)
In Nederland overlijden jaarlijks zo’n 4.100 mensen aan beroepsziekten, waarvan ongeveer 2.700 aan werkgerelateerde kanker. Ondanks goede initiatieven in risicovolle sectoren als de bouw, metaal en de houtverwerkende industrie om een gezonde werksituatie te creëren, blijkt de blootstelling aan kankerverwekkende stoffen als respirabel kwarts,...
other 2017
document
Belfroid, S.P.C. (author), Khosla, V. (author), Nennie, E.D. (author), Alberts, G.J.N. (author), Veeken, C.A.M. (author)
The influence of hydrophobic and hydrophilic tube walls on the pressure drop and liquid loading behavior was investigated in previous projects in the past. In this paper, results of visualization experiments and of experiments at different liquid-to-gas ratios and inclination angles are presented for hydrophobic tube walls. Experiments were...
conference paper 2014
document
Nennie, E.D. (author), Belfroid, S.P.C. (author), O'Mahoney, T.S.D. (author)
In this paper details of the measurement results of the forces on the bends in a 4" setup are compared to two models. The first model is a simple analytical model and is used to estimate the forces. In the second model, CFD is used. In the experiments only resulting forces, including upstream and downstream bends and mechanical resonance and...
conference paper 2013
document
Bolle, L. (author), de Jong, C.A.F. (author), Bierman, S.M. (author), van Beek, P.J.G. (author), Wessels, P.W. (author), Blom, E. (author), van Damme, C.J.G. (author), Winter, H.V. (author), Dekeling, R.P.A. (author)
In view of the rapid extension of offshore wind farms, there is an urgent need to improve our knowledge on possible adverse effects of underwater sound generated by pile-driving. Mortality and injuries have been observed in fish exposed to loud impulse sounds, but knowledge on the sound levels at which (sub-)lethal effects occur is limited,...
conference paper 2013
document
Gryzlov, A. (author), Schiferli, W. (author), Mudde, R.F. (author)
The growing demand for hydrocarbon production has resulted in improved oilfield management using various control and optimization strategies. These strategies increasingly require downhole equipment to obtain real-time oil and gas production rates with sufficient spatial and temporal resolution. In particular, downhole multiphase metering can...
article 2013
document
Golliard, J. (author), González Díez, N. (author), Belfroid, S.P.C. (author), Nakiboǧlu, G. (author), Hirschberg, A. (author)
Corrugated pipes, as used in flexible risers for gas production or in domestic appliances, can whistle when a flow is imposed through the pipe. Nakiboglu et al [1, 2] have developed a method to compute the acoustic source term for axi-symmetric cavities. The method is based on the resolution of incompressible Navier-Stoke equations without...
conference paper 2013
document
Golliard, J. (author), Belfroid, S.P.C. (author), González Diez, N. (author), Bendiksen, E. (author), Frimodt, C. (author)
Pipes with a corrugated inner surface, as used inflexible pipes for gas production and transport, can be subject to Flow-Induced Pulsations when the flow velocities are higher than a certain onset velocity. The onset velocity for classical corrugated pipes can be predicted on basis of the geometry of the corrugations, the operational conditions...
conference paper 2013
document
Belfroid, S.P.C (author), Golliard, J. (author), Korst, H.J.C. (author)
In the last few decades, flexible risers have increasingly been used in the offshore oil and gas industry. In gas applications these risers can generate high amplitude tonal pressure fluctuations when the gas velocity reaches a threshold value. The resulting pressure fluctuations can then cause high vibration and cyclic stress levels in the...
conference paper 2013
document
van Beek, P.J.G. (author), Smeulers, J.P.M. (author)
In pipe systems, carrying gas with high velocities, broadband turbulent pulsations can be generated causing strong vibrations and fatigue failure, called Acoustic Fatigue. This occurs at valves with high pressure differences (i.e. chokes), relief valves and obstructions in the flow, such as sharp bends and T-branches. Characteristic for the...
conference paper 2013
document
Golliard, J. (author), Belfroid, S.P.C. (author), Bendiksen, E. (author), Frimodt, C. (author)
Pipes for gas production and transport with a corrugated inner surface, as used in flexible pipes, can be subject to Flow-Induced Pulsations when the flow velocity is larger than a certain velocity. This onset velocity is dependent on the geometry of the corrugations, the operational conditions and the geometry of the topside and subsea piping....
conference paper 2013
document
Schenker, M. (author), Delfos, R. (author), Westerweel, J. (author), Twerda, A. (author), van Bokhorst, E. (author)
We observe the flow through a ribbed pipe, both at ambient and lower static pressure. A smooth pipe with 4 or 5 ribs inserted at several different distances serves as the measurement section. The flow friction is dependent on the distance between the ribs, which is an effect of a change in the flow interaction of the bulk flow with the regions...
conference paper 2013
document
Rudenko, O. (author), Meertens, D. (author), Nakiboǧlu, G. (author), Hirschberg, A. (author), Belfroid, S.P.C. (author)
Corrugated pipes combine small-scale rigidity and large-scale flexibility, which makes them very useful in industrial applications. The flow through such a pipe can induce strong undesirable whistling noises and even drive dangerous structural vibrations. Placing a short corrugated segment along a smooth pipe reduces the whistling, while this...
conference paper 2013
document
Golliard, J. (author), Belfroid, S.P.C. (author), Vijlbrief, O. (author)
From previous experiments, it was shown that small quantities of liquids reduce or eliminate the singing phenomenon in corrugated tubes. The singing mitigation was attributed to filling up of the corrugations, interference with the boundary layer or due to the increased acoustic damping. To evaluate the influence of the presence of liquids on...
conference paper 2013
document
Bögemann-Van Osch, M.M.E. (author), Hulsbosch-Dam, C.E.C. (author), Spruijt, M.P.N. (author)
public lecture 2013
document
Belfroid, S.P.C. (author), Khosla, V. (author), Nennie, E.D. (author), Alberts, G.J.N. (author), Veeken, C.A.M. (author)
The influence of hydrophobic and hydrophilic tube walls on the pressure drop and liquid loading behavior was investigated in previous projects in the past. In this paper, results of visualization experiments and of experiments at different liquid-to-gas ratios and inclination angles are presented for hydrophobic tube walls. Experiments were...
conference paper 2013
document
Velthuis, J.F.M. (author), van Bokhoven, L. (author)
The tangential momentum accommodation coefficient (TMAC) of H2 on electropolished stainless steel 304, extreme ultraviolet-resist, and polyimide was determined by measuring the mass flow through a macroscopic rectangular channel (100 cm × 10 cm × 1 cm) as a function of the pressure drop in the Knudsen range Knave ≈ 0-0.6. The TMAC and Knudsen...
article 2013
document
Schiferli, W. (author), Hansen, J.H. (author), Brasjen, B.J. (author), Belfroid, S.P.C. (author)
An experimental study on terrain-induced slugging on shallow inclines (typically less than 3°) has been conducted, using three setups with a pipe diameter of around 1”, with incline lengths of 1 m, 3 m and 24 m. In addition to an extensive characterization of the formation and evolution of slugs as a function of flow conditions and inclination...
conference paper 2013
document
van Ratingen, S.W. (author), de Jong, A.T. (author), Gousseau, P. (author)
High-speed stereo-PIV measurements were performed in the wake of 2.3 m wide fences (respectively 5 and 10 cm high). Average velocities and turbulent kinetic energy levels are given for a near fenceand a downstream field of view, showing the large recirculation zone of a near-2D obstacle. The results indicate that although PIV measurements can...
conference paper 2013
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