Finding the k value in a pipe flow question

AI Thread Summary
Calculating k values for pipe flow can be challenging, especially when relying on experimental data. In the discussion, the user is struggling to derive k values from Appendix A1 and is not achieving the expected results through interpolation. It is emphasized that k values are determined experimentally, which may explain discrepancies in calculations. Clarification on the methodology for using the appendix and interpolation techniques is sought. Accurate determination of k values is crucial for solving pipe flow questions effectively.
Stacyg
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I am trying to do a pipe flow question but I am having trouble understanding how they have calculated the k values.
Example question 1.1 attached & appendix A1 attached.
We have to use appendix A1 to find the k values. I have tried using interpolation to get the k values from the example question but I am not coming up with same numbers.
Any help would be much appreciated.

Stacy
 

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k values are determined experimentally.
 

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