A bend meter is installed in a 75-cm-diameter water pipe with an 80-cm bend radius as shown in Figure 9.9. The flow rate in the pipe is 0.850 m3/sec, and the pressure difference reading between the outside and inside taps registers 5.26 cm on a mercury-water manometer. Determine the coefficient of discharge for the bend meter if the pipe bend is in a vertical position and flow is downward. Note that in the vertical position the pressure taps are mounted along a 45° line from the horizontal datum.

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2 Figure 9.9 Bend meter