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1. Why we use Reynolds number instead of mean velocity as the criteria to judge the flow state passing through the pipe?  2. Does the ReDL or the ReDU change when the diameter is changed? 3. If we replace the pure water with the oil (Newtonian fluids), does the lower limit Reynolds number be the same? Why

1. Why we use Reynolds number instead of mean velocity as the criteria to judge the flow state passing through the pipe?  2. Does the ReDL or the ReDU change when the diameter is changed? 3. If we replace the pure water with the oil (Newtonian fluids), does the lower limit Reynolds number be the same? Why

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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1. Why we use Reynolds number instead of mean velocity as the
criteria to judge the flow state passing through the pipe?
 2. Does the ReDL or the ReDU change when the diameter is changed?
3. If we replace the pure water with the oil (Newtonian fluids), does
the lower limit Reynolds number be the same? Why? 

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