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Ingen Housz, E.M.R.M. (author), Ooms, G. (author), Henkes, R.A.W.M. (author), Pourquie, M.J.B.M. (author), Kidess, A. (author), Radhakrishnan, R. (author)An experimental and numerical study has been made of oil-water core-annular flow in a horizontal pipe with special attention for the turbulence in the water. An experimental set-up was built to be able to compare numerical predictions with detailed experimental results. The oil density was considerably smaller than the water density. Full 3D and...journal article 2017
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Werker, C. (author), Ooms, Ward (author), Caniëls, Marjolein C J (author)Previous studies investigating proximity and collaboration have not clarified personal elements, such as working or communication style. Here, we show that personal proximity—close similarity in terms of personal traits and behavioral patterns—substantially affects the whole life cycle of research collaborations. We conduct a multi-case study...journal article 2016
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Eisma, H.E. (author), Westerweel, J. (author), Ooms, G. (author), Elsinga, G.E. (author)New experimental research is presented on the characteristics of interfaces and internal shear layers that are present in a turbulent boundary layer (TBL). The turbulent/non-turbulent (T/NT) interface at the outer boundary of the TBL shows the presence of a finite jump in streamwise velocity and is characterised by a thin shear layer. It appears...journal article 2015
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Beerens, J.C. (author), Ooms, G. (author), Pourquie, M.J.B.M. (author), Westerweel, J. (author)high-viscosity liquid core surrounded by a laminar low-viscosity liquid annular layer through a vertical pipe. The numerical results are compared with theoretical results from linear stability calculations and with experimental data. The comparison is good and the general conclusion of our study is that it is very well possible to simulate...journal article 2014
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Ooms, G. (author), Pourquie, M.J.B.M. (author), Beerens, J.C. (author)A numerical study has been made of horizontal core-annular flow: the flow of a high-viscosity liquid core surrounded by a low-viscosity liquid annular layer through a horizontal pipe. Special attention is paid to the question how the buoyancy force on the core, caused by a density difference between the core and the annular layer, is...journal article 2013
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Warncke, N.G.W. (author), Delfos, R. (author), Ooms, G. (author), Westerweel, J. (author)In this work we study the preferential concentration of small particles in the turbulent wake behind a spherical-cap object. We present a model predicting the mean particle concentration in the near-wake as a function of the characteristic Stokes number of the problem, the turbulence level and the Froude number. We compare the model with our...conference paper 2011
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Felderhof, B.U. (author), Ooms, G. (author)The flow of a viscous compressible fluid in a circular tube generated by a sudden impulse at a point on the axis is studied on the basis of the linearized Navier–Stokes equations. A no-slip boundary condition is assumed to hold on the wall of the tube. An efficient numerical scheme has been developed for the calculation of flow velocity and...journal article 2011
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Bijlard, M.J. (author), Oliemans, R.V.A. (author), Portela, L.M. (author), Ooms, G. (author)The results of point-particle Eulerian–Lagrangian direct numerical simulation (DNS) calculations of dilute particle-laden turbulent channel flow are used to study the effect of the particles on the local flow topology. It is found that in the viscous sublayer, the flow becomes increasingly more two-dimensional as the two-way coupling effect (due...journal article 2010
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Piela, K. (author), Ooms, G. (author), Sengers, J.V. (author)We propose an extended Ginzburg-Landau model for a description of the ambivalence region associated with the phenomenon of phase inversion observed in dispersed water-oil flow through a pipe. In analogy to the classical mean-field theory of phase transitions, it is shown that a good quantitative representation of the ambivalence region is...journal article 2009
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Ooms, G. (author), Boersma, B.J. (author)A study was made of the possible similarity between the development of truncated, inviscid turbulence and the Fermi–Pasta–Ulam (FPU) problem. For the case of a constant time scale, which resembles the FPU problem, a significant increase in the time to achieve equipartition was found when the initial energy was decreased. At first a few modes...journal article 2008
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Ooms, T.A. (author)This thesis contributes to the development of an instrument that can measure fluid flow velocity in a three-dimensional (3D) measurement domain by holographic imaging.doctoral thesis 2008
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Descamps, M.N. (author), Oliemans, R.V.A. (author), Ooms, G. (author), Mudde, R.F. (author)This study deals with the influence of bubbles on a vertical air–water pipe flow, for gas-lift applications. The effect of changing the bubble size is of particular interest as it has been shown to affect the pressure drop over the pipe. Local measurements on the bubbles characteristics in the wall region were performed, using standard...journal article 2008
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- Ooms, T. (author), Koek, W. (author), Westerweel, J. (author) journal article 2008
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Poelma, C. (author), Westerweel, J. (author), Ooms, G. (author)The effect of small particles on decaying grid-generated turbulence is studied experimentally. Using a two-camera system, instantaneous fluid-phase and particlephase measurements can be obtained simultaneously. The data obtained with this system are used to study the decay behaviour of the turbulent flow. The role of particle size, particle...journal article 2007
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Core-annular flow through a horizontal pipe: Hydrodynamic counterbalancing of buoyancy force on coreOoms, G. (author), Vuik, C. (author), Poesio, P. (author)A theoretical investigation has been made of core-annular flow: the flow of a high-viscosity liquid core surrounded by a low-viscosity liquid annular layer through a horizontal pipe. Special attention is paid to the question of how the buoyancy force on the core, caused by a density difference between the core and the annular layer, is...journal article 2007
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- Tu, X. (author), Ooms, G. (author), Van Der Bas, F. (author) journal article 2007
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- Poesio, P. (author), Ooms, G. (author) journal article 2007
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- Ooms, T. (author), Koek, W. (author), Braat, J. (author), Westerweel, J. (author) journal article 2006
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- Poesio, P. (author), Ooms, G. (author), Ten Cate, A. (author), Hunt, J.C.R. (author) journal article 2006
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- Guet, S. (author), Ooms, G. (author) journal article 2006