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Article

Decay of Pressure and Energy Dissipation in Laminar Transient Flow

[+] Author and Article Information
B. Brunone, M. Ferrante, M. Cacciamani

University of Perugia, Dipartimento di Ingegneria Civile ed Ambientale, Via G. Duranti, 93, 06125, Perugia, Italy

J. Fluids Eng 126(6), 928-934 (Mar 11, 2005) (7 pages) doi:10.1115/1.1839926 History: Received November 10, 2003; Revised July 31, 2004; Online March 11, 2005
Copyright © 2004 by ASME
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References

Figures

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Numerical experiment. Friction term at mid-length section given by the Zielke’s model and quasi 2D Vardy and Hwang’s one (copper pipe; T=0.14 s and N0=1134)
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Numerical experiment. Pressure time-history given by the Zielke’s model and quasi 2D Vardy and Hwang’s one (copper pipe; T=0.14 s and N0=1134)
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Numerical experiment. Pressure time-history at mid-length section given by quasi 2D Vardy and Hwang’s model and 1D one with: k=kVH and k=kP (copper pipe; T=0.14 s and N0=1134)
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Numerical experiment. Decay coefficient, k, vs instantaneous Reynolds number, N, at mid-length section (copper pipe; T=0.14 s and N0=1134)
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Behavior of local velocity field close to the wall for laminar decelerating flows
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Numerical and experimental pressure time-histories at mid-length section (copper pipe; T=0.11 s and N0=815)
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Numerical and experimental pressure time-histories at mid-length section (copper pipe; T=0.14 s and N0=1339)
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Numerical and experimental pressure time-histories at mid-length section (polyethylene pipe; T=0.12 s and N0=2020)

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