Finding the k value in a pipe flow question

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SUMMARY

The discussion focuses on determining the k values in pipe flow calculations, specifically referencing an example question and appendix A1. The user is struggling with interpolation methods to derive these k values accurately. It is established that k values are determined experimentally, emphasizing the importance of empirical data in fluid dynamics calculations.

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Engineers, fluid dynamics students, and professionals involved in pipe flow analysis and experimental data interpretation will benefit from this discussion.

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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