Bernoulli's Principle with a Venturi Tube, find flow rate

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SUMMARY

The discussion centers on applying Bernoulli's equation to determine flow rates in a Venturi tube. The equation in question is ρgy1 + (1/2)v1^2 + P1 = ρgy2 + (1/2)v2^2 + P2, which relates pressure, velocity, and height at two points in the tube. A key point made is the necessity of an additional equation to account for mass flow consistency throughout the Venturi tube. The relationship A1 = 3A2 is also highlighted, indicating the cross-sectional area ratios needed for calculations.

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heatherro92
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So that's the question and I'm stuck on Part b. I don't even know how to approach it. I know A1= 3A2 but I don't know A1 and I need V2 and I don't know V1 or A2. I'm just confused as to how to do this. Please help!
 
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Are you aware of Bernoulli's equation? You mention Bernoulli in the title but don't quote the equation.
 
I understand the equation ρgy1+ (1/2)v1^2 + P1 =ρgy2+ (1/2)v2^2 + P2 but I do not understand how to apply it to this
 
heatherro92 said:
I understand the equation ρgy1+ (1/2)v1^2 + P1 =ρgy2+ (1/2)v2^2 + P2 but I do not understand how to apply it to this
You need one more equation, based on the fact that mass flow within all parts of the venturi tube is constant.
 

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