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

Freek Huthoff; Pieter C. Roos; Dionysius C.M. Augustijn; Suzanne J.M.H. Hulscher

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

Freek Huthoff, Pieter C. Roos, Dionysius C.M. Augustijn, Suzanne J.M.H. Hulscher

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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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 language	English
Title of host publication	5th International Symposium on Environmental Hydraulics (ISEH)
Subtitle of host publication	4-7 December 2007, Arizona State University, Tempe, AZ, USA
Editors	D. Boyer, O. Alexandrova
Publisher	Arizona State University / IAHR
Pages	1-6
Number of pages	6
Publication status	Published - 4 Dec 2007
Event	5th International Symposium on Environmental Hydraulics, ISEH 2007 - Tempe, United States Duration: 4 Dec 2007 → 7 Dec 2007 Conference number: 5

Conference

Conference	5th International Symposium on Environmental Hydraulics, ISEH 2007
Abbreviated title	ISEH
Country	United States
City	Tempe
Period	4/12/07 → 7/12/07

Keywords

IR-60445
METIS-240417

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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.

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

@inproceedings{1d2152bc806041fc8bfc195c503782e4,

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

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.",

keywords = "IR-60445, METIS-240417",

author = "Freek Huthoff and Roos, {Pieter C.} and Augustijn, {Dionysius C.M.} and Hulscher, {Suzanne J.M.H.}",

year = "2007",

month = "12",

day = "4",

language = "English",

pages = "1--6",

editor = "D. Boyer and O. Alexandrova",

booktitle = "5th International Symposium on Environmental Hydraulics (ISEH)",

publisher = "Arizona State University / IAHR",

}

Huthoff, F , Roos, PC , Augustijn, DCM & Hulscher, SJMH 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. Arizona State University / IAHR, pp. 1-6, 5th International Symposium on Environmental Hydraulics, ISEH 2007, Tempe, United States, 4/12/07.

A new method to account for large scale mixing-processes in spatially-averaged flow models. / Huthoff, Freek ; Roos, Pieter C.; Augustijn, Dionysius C.M.; Hulscher, Suzanne J.M.H.

5th International Symposium on Environmental Hydraulics (ISEH): 4-7 December 2007, Arizona State University, Tempe, AZ, USA. ed. / D. Boyer; O. Alexandrova. Arizona State University / IAHR, 2007. p. 1-6.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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AB - 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.

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