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8.8

Fluid flow in a pipe...

Asked by Edox in Math & Science

Have a quick fluid mechanics question for you:

A 12" steel pipeline is being used to cross a small coulee... the total lengh of the pipeline will be approximately 1000m, buried roughly 2m below surface. The path of the pipeline is saddle-shaped (like a U, as it is crossing under this coulee). Here's my question:

The pipeline is carrying natural gas with a water content. There is the chance that water will get stuck at the bottom of this U shaped section of pipe. In an extreme case, so much water will get stuck in the bottom  of this U shaped section of pipe that it will completely block off gas flow.

In this scenario (that the water at the bottom of this U shaped section of pipe blocks off all gas flow), what will be the required pressure to push this column of water up the pipe so it will resume flow?

The height differential (from bottom to top) is 40m, the pipe is 12". I know that it will have to overcome hydrostatic pressure (mgh), but what other losses are invovled? Is it simply a matter of overcoming the hydrostatic pressure?

Please help!, thanks!!
[+][-]02/28/07 10:02 AM, ID: 18627190Accepted Solution

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Solution Provided By: ozo
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