Skip to main content
placeholder image

Flow Partitioning in Rectangular Open Channel Flow

Journal Article


Download full-text (Open Access)

Abstract


  • Hydraulic engineers often divide a flow region into subregions to simplify calculations. However, the implementation of flow divisibility remains an open issue and has not yet been implemented as a fully developed mathematical tool for modeling complex channel flows independently of experimental verification. This paper addresses whether a three-dimensional flow is physically divisible, meaning that division lines with zero Reynolds shear stress exist. An intensive laboratory investigation was conducted to carefully measure the time-averaged velocity in a rectangular open channel flow using a laser Doppler anemometry system. Two innovative methods are employed to determine the locations of division lines based on the measured velocity profile. The results clearly reveal that lines with zero total shear stress are discernible, indicating that the flow is physically divisible. Moreover, the experimental data were employed to test previously proposed methods of calculating division lines, and the results show that Yang and Lim's method is the most reasonable predictor.

Publication Date


  • 2018

Citation


  • Han, Y., Yang, S., Sivakumar, M., Qiu, L. & Chen, J. (2018). Flow Partitioning in Rectangular Open Channel Flow. Mathematical Problems in Engineering, 2018 6491501-1-6491501-7.

Scopus Eid


  • 2-s2.0-85047649172

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2419&context=eispapers1

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/1417

Start Page


  • 6491501-1

End Page


  • 6491501-7

Volume


  • 2018

Place Of Publication


  • United States

Abstract


  • Hydraulic engineers often divide a flow region into subregions to simplify calculations. However, the implementation of flow divisibility remains an open issue and has not yet been implemented as a fully developed mathematical tool for modeling complex channel flows independently of experimental verification. This paper addresses whether a three-dimensional flow is physically divisible, meaning that division lines with zero Reynolds shear stress exist. An intensive laboratory investigation was conducted to carefully measure the time-averaged velocity in a rectangular open channel flow using a laser Doppler anemometry system. Two innovative methods are employed to determine the locations of division lines based on the measured velocity profile. The results clearly reveal that lines with zero total shear stress are discernible, indicating that the flow is physically divisible. Moreover, the experimental data were employed to test previously proposed methods of calculating division lines, and the results show that Yang and Lim's method is the most reasonable predictor.

Publication Date


  • 2018

Citation


  • Han, Y., Yang, S., Sivakumar, M., Qiu, L. & Chen, J. (2018). Flow Partitioning in Rectangular Open Channel Flow. Mathematical Problems in Engineering, 2018 6491501-1-6491501-7.

Scopus Eid


  • 2-s2.0-85047649172

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2419&context=eispapers1

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/1417

Start Page


  • 6491501-1

End Page


  • 6491501-7

Volume


  • 2018

Place Of Publication


  • United States