2. Two-fluid U tube. In Fig. 2.2-4b a two-fluid U tube is shown, which is a sensitive device for measuring small heads or pressure differences. Let A m² be the cross-sectional area of each of the large reservoirs and a m² be the cross-sectional area of each of the tubes forming the U. Proceeding and making a pressure balance as for the U tube, ・RO) (PA- PaPb= (R- Ro) - PB + a - a (2.2-15) where Ro is the reading when p. = Pb, R is the actual reading, PA is the density of the heavier luid, and pg is the density of the lighter fluid. Usually, a/A is made sufficiently small as to be egligible, and also Ro is often adjusted to zero; then Pa Pb= R(PA-PB)8 (SI)
2. Two-fluid U tube. In Fig. 2.2-4b a two-fluid U tube is shown, which is a sensitive device for measuring small heads or pressure differences. Let A m² be the cross-sectional area of each of the large reservoirs and a m² be the cross-sectional area of each of the tubes forming the U. Proceeding and making a pressure balance as for the U tube, ・RO) (PA- PaPb= (R- Ro) - PB + a - a (2.2-15) where Ro is the reading when p. = Pb, R is the actual reading, PA is the density of the heavier luid, and pg is the density of the lighter fluid. Usually, a/A is made sufficiently small as to be egligible, and also Ro is often adjusted to zero; then Pa Pb= R(PA-PB)8 (SI)
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Hello, pls derive the figure to the equation 2.2-15. How did 2-fluid-u-tube came up with that formula
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