Unformatted text preview: manometer
consisting of two fluids A and B We will assume that gravity acts in the vertical direction, and the origin of out coordinate system is
located somewhere below the Utube. The location is material for the analysis. Again the hydrostatic
pressure field is given by
p p
Ρg, p
0, x 0 y (28) z Now if the pressure in the bulb is p1 then the pressure at the fluidA/b interface is
p2 ΡA g H1 p1 (29) At the fluid B/air interface it is
p3 patm p2 ΡB g H2 (30) Thus the difference in pressure read by the manometer is
patm p1 ΡA g H1 ΡB g H2 (31) so that
p1 patm g ΡA H1 ΡB H2 Thus a manometer opened at one end to atmospheric pressure reads gage pressure (32) 6 Hydrostatics.nb References
The following texts were helpful in preparing these notes 1. Anthony Esposito, Fluid Mechanics with Applications, Prentice Hall,1998
2. Stephen Whitaker, Introduction to Fluid Mechanics, Kreiger Publishing Company, 1968...
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 Spring '14
 Fluid Mechanics, Force, Blaise Pascal

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