Particle-Laden Flow: From Geophysical to Kolmogorov Scales by B.J. Geurts, H. Clercx, W. Uijttewaal

By B.J. Geurts, H. Clercx, W. Uijttewaal

The dispersion of debris in a circulation is of valuable value in numerous geophysical and environmental difficulties. The spreading of aerosols and soot within the air, the expansion and dispersion of plankton blooms in seas and oceans, or the delivery of sediment in rivers, estuaries and coastal areas are amazing examples. those difficulties are characterised via powerful nonlinear coupling among a number of dynamical mechanisms. therefore, techniques on generally varied size and time scales are at the same time of significance. The multiscale nature of this difficult box influenced the EUROMECH colloquium on particle-laden circulation that used to be held on the college of Twente in 2006. This e-book incorporates a number of the papers that have been awarded.

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Extra resources for Particle-Laden Flow: From Geophysical to Kolmogorov Scales (ERCOFTAC Series)

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And Walstra, D. J. R. (2003). Modelling of sand transport in DELFT3D-ONLINE. WL—Delft Hydraulics, Delft [20] Wientjes, I. G. M. (2006). Grain size sorting over sand waves. CE&M research report 2006R-004/WEM-005 [21] Zyserman, J. A. and Fredsoe, J. (1994). Data-analysis of bed concentration of suspended sediment. J. Hydraulic Engg, 120, 1021-1042. A. J. O. nl Summary. In order to obtain more insight into the vertical transport of suspended sediment, an experiment was performed using a combination of PIV and PTV for the measurement of the fluid and particle velocity respectively.

The swirling flow pattern is clearly visible at this location, and it is also clear that a strong Q2 event can be found below the vortex head, which extends over the complete water depth. This means that the whole flow structure (vortex and the induced flow) can be classified as an attached eddy. It is also interesting to note the absence of strong Q4 events in this flow structure. A small Q3 event is visible upstream and below the vortex head. The conditionally averaged drift velocity is shown in figure 6.

Sand wave simulations on large domains. ) [16] Van der Veen, H. , Hulscher, S. J. M. , and Knaapen, M. A. F. (2005). Grain size dependency in the occurence of sand waves. 1007/s10236-005-0049-7) [17] Van Rijn, L. C. (1984). Sediment transport, part ii: Suspended load transport. J. Hydraulic Engineering, 11, 1613-1641 [18] Van Rijn, L. C. (1993). Principles of sediment transport in rivers, estuaries and coastal seas, vol. I11. Aqua Publications, Amsterdam [19] Van Rijn, L. C. and Walstra, D. J. R.

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