Mass flow rate calculation from velocity contour in pipe

In summary, mass flow rate can be calculated by multiplying the density of the fluid by the cross-sectional area of the pipe and the average velocity of the fluid. This calculation is important in various industries and scientific fields, as it helps in understanding the behavior and efficiency of fluids in a system. However, factors such as changes in fluid properties and pipe geometry can affect the accuracy of the calculation. The velocity contour in a pipe can be measured using different techniques, but there are limitations to using this method, including assumptions about the flow pattern and potential measurement errors.
  • #1
ca2n
10
0
Hello all,

Looking for ideas on how to calculate mass flow rate from a velocity contour plot. The cross-sectional area is circular. An example of the velocity contour plot is shown in the figure below:

38230090532_0d4a696530_b.jpg


In most of the cases (as exemplified above) the flow is non-axisymmetric. Any suggestions welcomed. Thank you in advance.
 

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  • #2
Why is it non-symmetric?
 
  • #3
Chestermiller said:
Why is it non-symmetric?

As a follow-up, why doesn't the velocity go to zero at the walls?
 
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1. How is mass flow rate calculated from velocity contour in a pipe?

The mass flow rate can be calculated by multiplying the density of the fluid by the cross-sectional area of the pipe and the average velocity of the fluid.

2. What is the importance of calculating mass flow rate from velocity contour in a pipe?

Calculating the mass flow rate is important in many industrial and scientific applications, such as in fluid dynamics, chemical engineering, and power generation. It helps in understanding the behavior and efficiency of fluids in a system.

3. What factors can affect the accuracy of mass flow rate calculation from velocity contour in a pipe?

The accuracy of the calculation can be affected by factors such as changes in fluid density, changes in fluid velocity, and changes in the pipe geometry. Other factors may include turbulence, friction, and the presence of obstructions in the pipe.

4. How can the velocity contour in a pipe be measured?

The velocity contour in a pipe can be measured using various techniques, including flow meters, pitot tubes, and laser Doppler anemometry. These methods involve measuring the velocity at different points in the pipe and constructing a contour map to visualize the flow pattern.

5. What are the limitations of using velocity contour to calculate mass flow rate in a pipe?

One limitation is that velocity contour measurements are based on assumptions about the flow pattern, which may not always accurately represent the actual flow behavior. Additionally, the accuracy of the measurement may be affected by the resolution of the measurement equipment and the interpretation of the data. Other limitations may include the complexity of the flow pattern and the difficulty in obtaining accurate velocity measurements in certain conditions.

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