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Nguyen, M.Q. (author), Simöens, S. (author), Delache, A. (author), El Hajem, M. (author), Bos, W. (author), Poole, R. (author)
The comparison of the results of direct numerical simulations of isotropic turbulence of Newtonian and viscoelastic fluid, based on the FENE-P model, provide evidence that viscoelasticity modifies qualitatively the behavior of the smallest scales: we observe a k−6 law in the far dissipation range of the energy spectrum and we show...
conference paper 2015
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Bos, W. (author), Kadoch, B. (author), Schneider, K. (author)
The angle between subsequent particle displacement increments is evaluated as a function of the timelag in isotropic turbulence. It is shown that the evolution of the average of this angle contains two well-defined power-laws, reflecting the multi-scale dynamics of high-Reynolds number turbulence.
conference paper 2015
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The directional change of a fluid particle can be measured by the angle between two subsequent particle displacement increments. At small values of the time-increment the so-defined angle is proportional to the curvature of the trajectory. At large values this coarse-grained curvature should be affected by the presence of solid no-slip walls...
conference paper 2015
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The temperature fluctuations generated by viscous dissipation in an isotropic turbulent flow are studied using direct numerical simulation. It is shown that the scaling of their variance with Reynolds number is at odds with predictions from recent investigations. The origin of the discrepancy is traced back to the anomalous scaling of the...
conference paper 2015
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Bos, J.W. (J.Bos@royalhskoning.com) (author), Winde, S.C. (sc.winde@portofrotterdam.com) (author)
This paper describes an innovative approach towards quay wall renovation design. In the “RDM Kraanbaan 13” project in Rotterdam, significant cost savings were made and environmental impact was minimised, while on a tight schedule and with limited information about the structure and its future use. Essential were a very practical and flexible...
conference paper 2010
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