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Friction factors and pressure drop for sinusoidal laminar flow of water and blood in rigid tubes
Author(s) -
Hershey Daniel,
Song Geasoon
Publication year - 1967
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690130318
Subject(s) - laminar flow , pressure drop , mechanics , friction factor , flow (mathematics) , friction loss , drop (telecommunication) , viscosity , materials science , thermodynamics , physics , chemistry , classical mechanics , engineering , reynolds number , mechanical engineering , turbulence
From the Navier‐Stokes equations and a modified Fanning equation, a theoretical equation was derived for computing friction factors and pressure drop for sinusoidal flow in rigid pipes. The friction factor equation was f = (π/16 S ) (16/ N Re ), which is analogous to the usual laminar flow equation. The factor S is dependent on the frequency and kinematic viscosity and is easily computed. Friction factors were calculated from experimental data and it was found that the theoretical friction factors predicted the experimental values to within less than 5%.