Sharp-Crested Weir Experiment

CIVE 440

SHARP-CRESTED WEIRS

Prepared by El-Khatib Zafer

Submitted to course instructor Dr. Habib Basha 3/21/2013

Table of Contents
Table of Contents .......................................................................................................................................... ii List of Figures ................................................................................................................................................ ii List of Tables ................................................................................................................................................ iii Executive Summary...................................................................................................................................... iv 1. 2. Introduction .......................................................................................................................................... 1 Methodology......................................................................................................................................... 1 2.1 Theory ........................................................................................................................................... 1 Governing Equations ............................................................................................................. 1 Underlying Assumptions ....................................................................................................... 5

2.1.1. 2.1.2. 2.2 3.

Modeling Steps ............................................................................................................................. 5

Results and Calculations ....................................................................................................................... 6 3.1 3.2 3.3 Rectangular Weir .......................................................................................................................... 6 Triangular

References: Bentley. (2009). V-Notch Sharp-Crest Weir. Retrieved March 17, 2013, from Bently: http://docs.bentley.com/en/HMFlowMaster/FlowMasterHelp-06-47.html E. John Finnemore, J. B. (2002). Fluid Mechanics. New York: Elizabeth A. Jones. Moody Diagram. (n.d.). Retrieved 3 4, 2013, from ezformula.net: http://www.ezformula.net/esne/aboard/skin/board/Blue%5BJanee%5D/img_view.php?image=.%2Fdat a%2Fbbs03%2F54%241%24Moody+diagram.jpg&title=%B9%AB%B5%F0(Moody)+Diagram Appendix Table 18: V-Notch coefficient of discharge Head (meters) 0.15 0.3 0.46 0.61 0.76 0.91 (Bentley, 2009) 22.5 0.611 0.593 0.586 0.583 0.580 0.579 30 0.605 0.590 0.583 0.580 0.578 0.577 Triangular Weir Angle (degrees) 45 60 0.596 0.590 0.583 0.580 0.578 0.575 0.576 0.573 0.574 0.572 0.574 0.571 90 0.584 0.576 0.572 0.571 0.570 0.570 120 0.581 0.575 0.672 0.571 0.570 0.570 P a g e | 19