I oughta know how to do this, but my google-fu is weak today. And no, it isn’t homework.
I need to use an adjustable vacuum source “pulling” on a vertical pipe to raise a column of water from an open-top basin to a height of 1 meter above the basin water’s surface. My plumbing is big enough in diameter that we can ignore capillary effects. Assume the basin is large enough that the fluid moving up the plumbing will lower the basin’s level only negligibly.
My vacuum source has a gauge calibrated in mmHg. What reading should I set on the source gauge to achieve the result?
Yes, I could just dial the vacuum up until I measure the correct column height. But this is part of a larger experiment and I’m trying to compute the right answer here so I can segregate the overall measured results into the portion attributable to the head gain and the portion attributable to the rest of the experiment.
And if my working fluid isn’t water but is something similarly (non-)viscous but with higher density, am I correct that my vacuum needs to increase by the density ratio vs water = specific density?