Open AccessThe coefficientof hydraulic friction of laminar open flows in smooth channels
Author(s) -
M. L. Medzveliya,
В. С. Боровков
Publication year - 2015
Publication title -
vestnik mgsu
Language(s) - English
Resource type - Journals
eISSN - 2304-6600
pISSN - 1997-0935
DOI - 10.22227/1997-0935.2015.5.86-92
Subject(s) - laminar flow , mechanics , hydraulic resistance , open channel flow , hydraulic diameter , flow (mathematics) , friction coefficient , surface tension , channel (broadcasting) , materials science , thermodynamics , geology , physics , reynolds number , engineering , composite material , turbulence , electrical engineering
The article examines the dependence of the hydraulic friction coefficient of open laminar uniform streams on the relative width of channels with smooth bottom. The article presents the functional dependence that describes the hydraulic resistance in open channels with smooth bottoms.The experiments were carried out in a rectangular tray (6000×100×200). Aqueous solutions of glycerol were used as working fluids. The superficial tension and liquid density for the used liquids changed a little. The article declares that the coefficient of hydraulic friction λ in the zone of the laminar flow depends on the relative width of the channels with smooth bottom. In the article it is also shown that the Charny formula satisfactorily agrees with the theoretical formula and with the experimental data.