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Pressure boundary condition

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Old   April 22, 2023, 06:12
Question Pressure boundary condition
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Yaroslav Ivanov
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Hi!
I have pipeline which lead from gas balloon to vacuum chamber. Gas is injected into the chamber from a gas pipeline. The Static pressure was measured at the beginning of the pipeline. It amounted to 160 Pa. The pressure in the chamber is less 1 Pa. I am need to know distribution of pressure in pipeline. How to correctly set the boundary conditions using only the static pressure at the inlet and outlet?
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Old   April 23, 2023, 07:21
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Lorenzo Galieti
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you need to presume the static pressure at the inlet is more or less equal to the total pressure. This is fine if you have highly subsonic flow.

Assigning two static pressures is a bad idea. It cannot even be done I think.
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