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Highly porous materials are found in various industrial applications and environmental flows. In previous studies it was found that a turbulent flow along a highly porous wall experiences a higher skin friction as compared to a solid wall with similar surface roughness when the so-called permeability Reynolds number (Re_K) is larger than O(1)....
conference paper 2015
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Experimental research is presented on the characteristics of interfaces and internal layers that are present in a turbulent boundary layer (TBL). Both the turbulent non-turbulent interface (T/NT) and internal shear layers are detected in snapshots of the stereo-PIV data. It turns out that the internal layers exhibit similar characteristics...
conference paper 2015
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The interaction between scales is investigated in a turbulent mixing layer. The large-scale amplitude modulation of the small scales already observed in other works depends on the crosswise location. Large-scale positive fluctuations correlate with a stronger activity of the small scales on the low speed-side of the mixing layer, and a reduced...
conference paper 2015
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Goudar, M.V. (author), Elsinga, G.E. (author)
Pair dispersion is studied to model scalar transport in many natural and industrial applications. The link between the particle pair dispersion and coherent flow structures is explored in this work. This was done by kinematically simulating tracer particles in an ideal flow structure [Elsinga and Marusic (2010)] extracted from an isotropic...
conference paper 2015
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Gul, M. (author), Elsinga, G.E. (author), Westerweel, J. (author)
This study investigates the effect of the Taylor-Couette geometry, namely the aspect ratio, Γ, and the gap width ratio, ƞ, on the torque hysteresis reported by [1]. Measurements were taken at two shear Reynolds numbers, Re s, of 5.5x10⁴ and 9x10⁴.The torque was recorded while decreasing or increasing the rotation frequency ratio a=-fo/fi,...
conference paper 2015
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Elsinga, M. (author)
Het rapport van de parlementaire enquêtecommissie woningcorporaties. De visie van zes woonhoogleraren.
conference paper 2014
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Fiscaletti, D. (author), Elsinga, G.E. (author), Westerweel, J. (author)
The present work involves the investigation of the fine scale motions in the turbulent region of a high Reynolds number air jet. In the fully developed region of the jets, the small scales of turbulence are assumed to be isotropic, and expected to contain elongated vortices (worms), whose diameter scales with the Kolmogorov length scale. Aimed...
conference paper 2013
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Tokgoz, S. (author), Elsinga, G.E. (author), Westerweel, J. (author)
Time-resolved tomographic PIV was used to investigate the time evolution of turbulent flow structures in Taylor-Couette flow. Turbulence is created by the shear due to exact counter rotation of the cylinders, where the mean velocity is zero in the bulk flow. This enables to observe the structures longer than many other turbulent flow types,...
conference paper 2013
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Elsinga, G.E. (author)
This paper discusses and compares several methods, which aim to remove spurious peaks, i.e. ghost particles, from the volume intensity reconstruction in Tomographic-PIV. The assessment is based on numerical simulations of timeresolved tomographic-PIV experiments in linear shear flows. Within the reconstructed volumes intensity peaks are detected...
conference paper 2013
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Elsinga, M.G. (author)
conference paper 2012
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Elsinga, M.G. (author)
Waar gaat het heen met de woningcorporaties? De financiële stabiliteit staat onder druk, doelgroep en kerntaken worden geherdefinieerd, het toezicht gaat op de schop. Marja Elsinga schetst een toekomstscenario
conference paper 2012
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Elsinga, M.G. (author)
Inleiding in het kader van het Symposium 'De toekomst van de woningmarkt voor de middeninkomens'
conference paper 2012
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Van der Heijden, H. (author), De Jong, M. (author), Elsinga, M. (author)
Themasessie J: De actuele situatie op de woningmarkt
conference paper 2011
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Van der Heijden, H.M.H. (author), De Jong Tennekes, M. (author), Elsinga, M.G. (author)
conference paper 2011
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Toussaint, J. (author), Elsinga, M. (author)
In many European countries ageing of the population puts pressure on collective welfare provision for the elderly. It is assumed that households increasingly have to take care of own financial means or rely more on family members in retirement. For the owner-occupiers, their dwelling – more specifically their housing equity – is usually the...
conference paper 2010
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Kramer, B. (author), Elsinga, M. (author)
Parallelsessie II. E. De waarde van Koopgarant
conference paper 2010
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Toussaint, J. (author), Elsinga, M. (author)
Workshop 3. Session A. Abstract. Is home ownership the European dream? Since decades there is a discussion in housing literature on the meaning of housing tenure. Is there an innate preference to own as Saunders suggests, or can renting also satisfy basic needs of security? This paper examines the differences and similarities in the meaning of...
conference paper 2006
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