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

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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.
Original languageEnglish
Title of host publication5th International Symposium on Environmental Hydraulics (ISEH)
Subtitle of host publication4-7 December 2007, Arizona State University, Tempe, AZ, USA
EditorsD. Boyer, O. Alexandrova
PublisherArizona State University / IAHR
Pages1-6
Number of pages6
Publication statusPublished - 4 Dec 2007
Event5th International Symposium on Environmental Hydraulics, ISEH 2007 - Tempe, United States
Duration: 4 Dec 20077 Dec 2007
Conference number: 5

Conference

Conference5th International Symposium on Environmental Hydraulics, ISEH 2007
Abbreviated titleISEH
CountryUnited States
CityTempe
Period4/12/077/12/07

Keywords

  • IR-60445
  • METIS-240417

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  • Cite this

    Huthoff, F., Roos, P. C., Augustijn, D. C. M., & Hulscher, S. J. M. H. (2007). A new method to account for large scale mixing-processes in spatially-averaged flow models. In D. Boyer, & O. Alexandrova (Eds.), 5th International Symposium on Environmental Hydraulics (ISEH): 4-7 December 2007, Arizona State University, Tempe, AZ, USA (pp. 1-6). Arizona State University / IAHR.