Determining Flow Rate from a Closed Pipe

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Discussion Overview

The discussion revolves around determining the flow rate of water from a closed pipe, specifically focusing on a scenario where a hose branches off from the main flow pipe. Participants explore the implications of measuring stagnation pressure and the conditions under which flow can be assessed.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant suggests measuring stagnation pressure at the main pipe to find the flow rate, despite the hose being closed.
  • Another participant asserts that if the pipe is closed, there will be no flow, questioning the clarity of the problem description.
  • A third participant agrees with the previous assertion, emphasizing that a closed pipe implies no flow or acceleration.
  • The original poster clarifies that by "closed pipe," they meant a connection from the water mains to a tank without access to the outlet for flow measurement.
  • The original poster later mentions they are considering installing a flow meter on the pipe, indicating a potential resolution to their inquiry.

Areas of Agreement / Disagreement

Participants express disagreement regarding the implications of a closed pipe on flow. Some assert that a closed pipe means no flow, while the original poster clarifies their situation, suggesting that there may be a misunderstanding of the term "closed pipe."

Contextual Notes

The discussion lacks a clear schematic or detailed explanation of the pipe system, which may contribute to misunderstandings about flow conditions. The original poster's use of the term "closed pipe" is not universally understood among participants.

Who May Find This Useful

Individuals interested in fluid dynamics, plumbing systems, or flow measurement techniques may find this discussion relevant.

vatsald
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im trying top find the flow rate of water from a closed pipe.
one thing that i think i can work with is a hose.
there is a hose branching of the main flow pipe, which can be used to clean floor etc.

im thinking that i can not open the hose and thus measure the stagnatiob pressure at the main pipe.
i need help to find a flow rate from this.
any ideas?
 
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vatsald said:
im trying top find the flow rate of water from a closed pipe.
one thing that i think i can work with is a hose.
there is a hose branching of the main flow pipe, which can be used to clean floor etc.

im thinking that i can not open the hose and thus measure the stagnatiob pressure at the main pipe.
i need help to find a flow rate from this.
any ideas?

If the pipe is closed there will be no flow.

Your problem description isn't clear, can you provide a more coherent explanation or better yet, a schematic/sketch?

CS
 
totally agree with stewarcts. when the pipe is closed, that mean no flow, no acceleration but u has a volume.
 
Anikirol88 said:
totally agree with stewarcts. when the pipe is closed, that mean no flow, no acceleration but u has a volume.

Yeah sorry guys. By closed pipe i meant, the pipe is connected from the water mains to the tank, and i don't have an access to the outlet where i can measure the flow.

But the its algud now, I am in talks to put a flow meter on the pipe. so the problems solved, bt thanks anyways.
 

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