A new method to account for large-scale mixing processes in spatially-averaged flow models

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Huthoff, Fredrik and Roos, Pieter C. and Augustijn, Denie C.M. and Hulscher, Suzanne J.M.H. (2007) A new method to account for large-scale mixing processes in spatially-averaged flow models. In: Fifth International Symposium on Environmental Hydraulics, ISEH V, 4-7 December 2007, Tempe, Arizona.

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Abstract:A new method is proposed to calculate the cross-sectional flow field in compound channels for 1D flow models. The proposed method involves a new parameterization of the interface stress between adjacent compartments, typically between the main channel and floodplain of a two-stage channel. This expression, proportional to the difference in squared velocities allows for a simple calculation of the average flow velocities in different compartments. For two-stage channels good agreement is found between the model results and data from literature. Also, it is shown that the description of compartment-averaged velocities may be applied to flows in channel cross-sections with arbitrary geometry, thus providing a potentially useful improvement to 1D river flow models.
Item Type:Conference or Workshop Item
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Engineering Technology (CTW)
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Link to this item:http://purl.utwente.nl/publications/60445
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