Re: A Better proof example

Posted by Someone on Mar 28, 2002 at 11:31
(209.47.1.92)

Re: A Better proof example (Paul)

The fluid pressure would not be 2000psi in the pipe because there would be a pressure loss due to the orifice at the end of the pipe. The smaller the orifice hole, the higher the pressure in the pipe, but the smaller the force exerted by the fluid escaping the pipe (less fluid mass per sec). The larger the orifice hole, the less the pressure in the pipe due to the fluid escaping from the hole.

In any event, in order to maintain 2000 psi in the pipe, and also rotate the pipe due to the force of fluid escaping (thus creating loss of pressure), you would have to add additional fluid pressure to compensate.

By the way, centripetal force is not going to help increase the pressure that much, compared with the amount of pressure you would need to add to actually overcome inertia and increase the rotational speed of a pipe filled with fluid.

The equations in a first year university physics textbook would tell you a similiar story.

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