Question:
Which of the following Reynolds numbers do(es) NOT represent creeping flow?
Which of the following Reynolds numbers do(es) NOT represent creeping flow?
Show Hint
Creeping flow needs the Reynolds number to be much smaller than 1.
Updated On: Jul 28, 2026
- 0.01
- 0.001
- \(5 \times 10^5\)
- 2300
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Verified By Collegedunia
The Correct Option is C, D
Solution and Explanation
Step 1: Recall the range of creeping flow.
Creeping flow, also called Stokes flow, happens when viscous forces dominate over inertial forces so strongly that the Reynolds number is much less than 1.
In practice this means \(Re \ll 1\), typically \(Re\) below about 1.
Step 2: Check each value against this range.
\(Re = 0.01\) and \(Re = 0.001\) are both far smaller than 1, so these represent creeping flow.
\(Re = 5 \times 10^5\) is a very high Reynolds number and describes strongly turbulent flow, nowhere close to creeping flow.
\(Re = 2300\) is the classic transition value for pipe flow, well above 1, so it also does not represent creeping flow.
Final Answer:
Only \(5 \times 10^5\) and 2300 fail to represent creeping flow.
\[ \boxed{\text{C, D}} \]
Creeping flow, also called Stokes flow, happens when viscous forces dominate over inertial forces so strongly that the Reynolds number is much less than 1.
In practice this means \(Re \ll 1\), typically \(Re\) below about 1.
Step 2: Check each value against this range.
\(Re = 0.01\) and \(Re = 0.001\) are both far smaller than 1, so these represent creeping flow.
\(Re = 5 \times 10^5\) is a very high Reynolds number and describes strongly turbulent flow, nowhere close to creeping flow.
\(Re = 2300\) is the classic transition value for pipe flow, well above 1, so it also does not represent creeping flow.
Final Answer:
Only \(5 \times 10^5\) and 2300 fail to represent creeping flow.
\[ \boxed{\text{C, D}} \]
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