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I am just thinking about this phenomenon: We have a horizontal pipeline with a flowing liquid, which contains a small bubble of gas. How do the dimensions of this bubble change when it reaches a narrower point of the pipeline? Are there practical applications that track bubble sizes to estimate the properties of the flow?

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Probably assuming also that the bubble does not split into smaller bubbles right? –  cinico Sep 2 '13 at 19:06
    
Related Meta question: meta.physics.stackexchange.com/q/4940/2451 –  Qmechanic Sep 14 '13 at 12:48

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