Momentum correction factor is defined as the ratio of
A. Momentum of flow per second based on actual velocity to the momentum of flow per second based on average velocity.
B. Momentum of flow per second based on average velocity of to the momentum of flow per second based on actual velocity.
C. Momentum of flow per second based on actual velocity to the drag force.
D. Momentum of flow per second based on average velocity to the drag force.
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Right Answer is: A
SOLUTION
Explanation:
Momentum correction factor:
The momentum correction factor is defined as the ratio of momentum of the flow per second based on actual velocity to the momentum of the flow per second based on average velocity across a section.
\(\beta = \;\frac{{Momentum\;per\;second\;based\;on\;actual\;velocity}}{{Momentum\;per\;second\;based\;on\;average\;velocity}}\)
\(\beta = \frac{1}{{A{V^2}}}\smallint {u^2}.dA\)
For turbulent flow, the momentum correction factor is slightly higher than one near to 1.2 and for laminar, its value is 1.33.