All i found related to this question is Hagen-Poiseuille equation, but it is not suitable for the ending of pipe.
I want to know what is the pressure of the gas after it is expelled from the pipe. I only know flow rate and diameter of pipe.
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2 Answers
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If the gas velocity is subsonic, then the pressure at the outlet of the pipe is the ambient pressure.
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$\begingroup$ Even if it blows at the plate, located very close to the outlet? $\endgroup$ Commented Feb 2, 2017 at 8:45
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$\begingroup$ flat plate, perpendicular to the pipe. About 0.2mm between plate and the pipe's outlet. $\endgroup$ Commented Feb 2, 2017 at 14:37
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$\begingroup$ What size pipe, what flow rate, what fluid? That would be the minimum amount of information required to even understand what you are talking about. There's a good chance, however, that the answer to your question will not be easy to obtain from first principles. If this is an engineering problem, you may want to ask in the engineering forum. $\endgroup$– PirxCommented Feb 2, 2017 at 14:42
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At the outlet the pressure will be the same as ambient (atmospheric?) pressure.
answered Feb 1, 2017 at 19:33
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$\begingroup$ Even if it blows at the plate, located very close to the outlet? $\endgroup$ Commented Feb 2, 2017 at 8:46