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A ratio between actual volumetric flowrate through the the real orifice and volumetric flowrate estimate through the ideal orifice:
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| LaTeX Math Block | ||||
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{\rm Re} = \frac{v \cdot D}{\nu} = \frac{4 \, q}{\pi \, D \, \nu} |
where
| kinematic viscosity | ||||
| cross-sectional average flow velocity in a pipe |
It can be estimated for popular choke types or tabulated in laboratory.
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