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What should be the maximum average velocity in a tube of diameter 2.0 cm so that the flow is laminar? The viscosity of water is 0.001N/s2.
I am not understanding how do i start this question.
Thank you for your help.
Hi
The formula is
Here the formula used is (1)
Now
When the Reynolds number is less than 2000, flow will be described as laminar When the Reynolds number is greater than 4000, flow will be described as turbulent When the Reynolds number is in the range of 2000 to 4000 the flow is considered transitional
So we have
2000 = 103 (v) 2*10-2/0.001
=> v = 0.1 m/s
Note density of water = 103 kg/m3
Thanks
Anurag Kishore
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