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You are here : eLibrary : IAHR World Congress Proceedings : 34th Congress - Brisbane (2011) : THEME 7: Hydroinformatics : Coupled depth averaged-rans model for open channel flow
Coupled depth averaged-rans model for open channel flow
Author : H. Zobeyer and P. M. Steffler
A coupled depth averaged (DA) and Reynolds averaged Navier-Stokes (RANS) model is developed where at first the water surface and DA velocity are modeled by a DA model neglecting non uniform velocity (NUV) and non hydrostatic pressure (NHP) which are then used as input to the RANS model with the computed water surface as a fixed boundary. A correction term is introduced in the RANS horizontal momentum equations and modeled such that the mean of the computed RANS horizontal velocity profile is equal to the DA velocity. Once the RANS model results are available, water surface and DA velocity are updated by incorporating the effects of NUV and NHP in the DA model. This feedback is repeated until a specified criterion is met. The model is developed and tested for 2D plane flow. The agreement between the model and experimental results is quite satisfactory with excellent computational efficiency.
File Size : 226,255 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 34th Congress - Brisbane (2011)
Article : THEME 7: Hydroinformatics
Date Published : 01/07/2011
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