Fluid Properties and Hydrostatics (4B)
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QUESTION
If tube radius doubles, by what factor does
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change in Poiseuille flow (all else constant)?
QUESTION
If pipe area decreases to
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3
\frac{1}{3}
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1
of its original value, what happens to speed for incompressible flow?
QUESTION
If tube radius doubles, by what factor does
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Q
Q
change in Poiseuille flow (all else constant)?
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ANSWER
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increases by a factor of
16
16
16
. In Poiseuille flow, volumetric rate scales with the fourth power of radius, so doubling radius multiplies flow by 16.
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