Unformatted text preview: which are all within ±0.003 of each other. 4) The discharge coefficient might be dependent on the discharge at low water head because of equation 6. Since you are taking the square root of Ho, when it is a lower number it will impact the value of Cd even less. Because of this, the discharge, Qa, will impact Cd much more. 5) The coefficient values obtained for the sharp-edged are about 0.313 lower than the values for the re-entrant. This is due to the fact that in equation 7, Cd = CvCc. For the re-entrant, Cv = Cc while in the sharp edged, Cv is greater than Cc. 6) According to equation 6, there is no possible way to have flow when Ho = 0. The only way I could account for it is if there was still some liquid dripping off the orifice and was not being counted as Ho, but still counted as Qa....
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- Spring '08
- Fluid Dynamics, Sharp Edge, upper reach velocity