The oscillating manometer: A review of experimental, theoretical, and computational results

✍ Scribed by John C. Biery

• Publisher: American Institute of Chemical Engineers
• Year: 1969
• Tongue: English
• Weight: 549 KB
• Volume: 15
• Category: Article
• ISSN: 0001-1541
• DOI: 10.1002/aic.690150433

✦ Synopsis

In a previous paper (15) P. D. Richardson raised questions about the numerical and experimental techniques used by the present author in the analysis of the oscillating manometer (13, 1 4 ) . Therefore, a complete review of the experimental and theoretical efforts, to understand fully the problems in measuring and describing fluid behavior in a manometer, is thought advisable. In the following sections the numerical techniques used by the author are reviewed along with a comparison of analytical results of other authors. Also, the secondary effects such as reversal end effects and start-up phenomena in reference to the experimental results are discussed.

VARIATION OF DAMPING FACTOR WITHIN A RUN

Richardson suggested that the damping factor should vary with each half cycle because the initial flat velocity profile is not repeated. The numerical calculations showed this condition to be true (13, 1 4 ) , and the calculated damping factor did vary with each half cycle. The calculated data for run 20 indicate the general effect observed for Newtonian fluids.