Calculating flow through parallel pipes

In summary, the problem is to calculate the flow through two parallel pipes, one being 8 inches and the other 1 inch in diameter. The flow is determined by the resistance in the pipe, which can be calculated by finding the cross-sectional area and the velocity. However, the velocity cannot be calculated without additional information.
  • #1
kollarjd
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Homework Statement



I am trying to calculate the flow through two parallel pipes. From an 8in line, a 1in line T's off and then joins back together downstream.

How do I go about solving a problem like this? The delta P should be equal for both streams so the flow should be determined by the resistance in the pipe, correct? I am having trouble calculating the resistance in the pipe...

Homework Equations





The Attempt at a Solution


 
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  • #2
Flow (Q) is the velocity times the area.

Since you have the diameter of the pipe you can find the cross-sectional area then all you need is the velocity.

With what you've given so far I don't see a way to calculate the velocity. Are you leaving something out.?
 

FAQ: Calculating flow through parallel pipes

1. How do you calculate the flow rate through parallel pipes?

The flow rate through parallel pipes can be calculated by adding the individual flow rates of each pipe. This can be done by using the formula Q = VA, where Q is the flow rate, V is the velocity of the fluid, and A is the cross-sectional area of the pipe. By finding the flow rate for each pipe and adding them together, you can determine the total flow rate through the parallel pipes.

2. How do you determine the velocity of the fluid in each pipe?

The velocity of the fluid in each pipe can be determined by using the formula V = Q/A, where V is the velocity, Q is the flow rate, and A is the cross-sectional area of the pipe. By plugging in the known values for flow rate and pipe diameter, you can calculate the velocity for each individual pipe.

3. What factors can affect the flow rate through parallel pipes?

The flow rate through parallel pipes can be affected by several factors, including the diameter and length of the pipes, the fluid viscosity, and the pressure difference between the two ends of the pipes. Additionally, any obstructions or bends in the pipes can also impact the flow rate.

4. How do you account for different pipe sizes in calculating flow rate?

To account for different pipe sizes, you will need to calculate the flow rate for each individual pipe using the formula Q = VA, where Q is the flow rate, V is the velocity, and A is the cross-sectional area of the pipe. Once you have determined the flow rate for each pipe, you can add them together to get the total flow rate through the parallel pipes.

5. Can you use the same formula for calculating flow rate in series pipes?

No, the formula for calculating flow rate in parallel pipes is different from the formula for series pipes. In series pipes, the flow rates do not simply add together, but rather the flow rate is determined by the pipe with the smallest flow rate. The formula for series pipes is Q = VA, where Q is the flow rate, V is the velocity, and A is the cross-sectional area of the smallest pipe.

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