Calculating Mass Flow Rate of a Fluid in a Pipe

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Discussion Overview

The discussion revolves around calculating the mass flow rate of a fluid in a pipe, given specific parameters such as pipe diameter, flow velocity, and specific volume. It involves theoretical reasoning and mathematical application related to fluid dynamics.

Discussion Character

  • Technical explanation
  • Mathematical reasoning

Main Points Raised

  • One participant asks how to calculate the mass flow rate using given parameters.
  • Another participant provides a formula for mass flow rate, stating it equals density multiplied by area and velocity, and calculates a mass flow rate of 5.202 kg/s.
  • A third participant emphasizes the importance of unit consistency and understanding the relationship between the variables involved in the calculation.
  • A later reply confirms the calculation provided and questions whether the original poster understands the underlying principles of the formula used.

Areas of Agreement / Disagreement

There is no explicit consensus on the correctness of the calculation, as some participants focus on understanding the principles while others confirm the numerical result.

Contextual Notes

Participants highlight the need to check units and understand the relationships between variables, but do not resolve any potential discrepancies in the calculation process.

felixj500
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Hi, how do i work this one out?

The mass flow rate of a fluid flowing through a section of pipe with a diameter of 38mm at a flow velocity of 5ms-1 with a specific volume of 0.00109 m3/kg is?

Thanks,
 
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mass flow rate = density * area * velocity
density = 1 / specific volume

mass flow rate = 5.202 kg/s

is that right?
 
You have:
Pipe diameter
Flow velocity
and sp.Vol.

Look at your units, then look at the units of the answer you expect and try to work it out. Equations are not enough, try to understand what is happening.

You've got a mass of liquid flowing through a pipe at a certain velocity, yea? The pipe has a given cross sectional area, and a specific amount of liquid will pass through a given cross section at any time, given the flow velocity, right?

So think about how you can relate these variables into something usable.
 
Also, yep. That's correct. Do you understand how that formula makes sense, though?
 

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