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Unsteady Flow in a Reservoir‐Conduit System
Author(s) -
Yu YunSheng,
Gray Mack H.
Publication year - 1969
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/wr005i003p00660
Subject(s) - electrical conduit , inertia , displacement (psychology) , mechanics , pipe flow , flow (mathematics) , piping , acceleration , fluid dynamics , geology , inlet , geotechnical engineering , physics , engineering , thermodynamics , turbulence , classical mechanics , geomorphology , mechanical engineering , psychology , psychotherapist
The one‐dimensional method of solution computes successfully the instantaneous average displacement, velocity, and acceleration of fluid in the pipe and the water depth in the reservoir when a valve at the end of the conduit is suddenly opened. Measurements of the instantaneous average fluid displacement in the pipe for different values of B/D (reservoir diameter to pipe diameter) agree very well with the computed values. For a specific inlet geometry and a given value of the ratio of pipe length to pipe diameter, the lumped inertial parameter decreases as B/D increases and reaches a minimum value as B/D becomes infinity. The neglect of the inertia of fluid in the reservoir in computing the unsteady flow characteristics is justifiable if B/D is larger than 90 and L/D much larger than 0.47.