- #1
Minghan
- 17
- 2
- TL;DR Summary
- How was the Pipe frictional loss graph created ?
Using which formula to create?
Are there any hydraulic book talking about this ?
What is the relationship between pipe diameter and frictional loss?
- Thread starter Minghan
- Start date
In summary, the conversation discussed the Moody Diagram, which is used to calculate pressure loss in pipes. The diagram includes the formula for pipe friction loss and provides a friction factor based on pipe roughness and Reynolds Number. To learn more about related concepts such as laminar vs turbulent flow, viscosity, head loss, density, and Reynolds Number, it is recommended to consult a book on fluid mechanics.
- #2
jrmichler
Mentor
- 2,240
- 2,993
The chart in Post #1 is an attempt to simplify the Moody Diagram and make it easier to use. The Moody diagram is the basic source for calculating pressure loss in pipes.
The formula for pipe friction loss is included in the Moody diagram (or Moody chart). Search those terms for more information. The Moody diagram provides a friction factor as a function of pipe roughness and Reynolds Number. A typical Moody chart is shown below:
To learn more about laminar vs turbulent flow, viscosity, head loss, density, and Reynolds Number, get a book about fluid mechanics. The title will be something like Fluid Mechanics, Engineering Fluid Mechanics, Introductory Fluid Mechanics, or similar. There are many such books available, almost anyone should have the information you need.
The formula for pipe friction loss is included in the Moody diagram (or Moody chart). Search those terms for more information. The Moody diagram provides a friction factor as a function of pipe roughness and Reynolds Number. A typical Moody chart is shown below:
To learn more about laminar vs turbulent flow, viscosity, head loss, density, and Reynolds Number, get a book about fluid mechanics. The title will be something like Fluid Mechanics, Engineering Fluid Mechanics, Introductory Fluid Mechanics, or similar. There are many such books available, almost anyone should have the information you need.
- #3
Minghan
- 17
- 2
Thank you so much!
1. What is a pipe frictional loss graph?
A pipe frictional loss graph is a graphical representation of the relationship between the flow rate of a fluid through a pipe and the corresponding pressure drop or head loss due to friction. It helps engineers and scientists to determine the optimal pipe size and design for a given fluid flow system.
2. How is a pipe frictional loss graph created?
A pipe frictional loss graph is created by conducting experiments or using mathematical models to determine the pressure drop or head loss at different flow rates for a specific pipe material, size, and fluid. The data is then plotted on a graph to show the relationship between the two variables.
3. What factors affect the shape of a pipe frictional loss graph?
The shape of a pipe frictional loss graph is affected by several factors, including the pipe material, size, roughness, and fluid properties such as viscosity and density. The flow velocity and Reynolds number also play a significant role in determining the shape of the graph.
4. How is a pipe frictional loss graph used in engineering?
A pipe frictional loss graph is used in engineering to determine the pressure drop or head loss in a fluid flow system, which is essential for selecting the appropriate pump, pipe size, and flow rate. It also helps to identify any potential issues, such as high pressure drop or flow velocity, that could lead to system failure.
5. What are the limitations of a pipe frictional loss graph?
One limitation of a pipe frictional loss graph is that it is based on ideal conditions and does not account for factors such as pipe bends, fittings, and changes in elevation, which can affect the actual pressure drop in a system. It also assumes a constant fluid density and viscosity, which may not be true in real-world applications.
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