JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
Print ISSN : 0021-9592
EDDY DIFFUSIVITY IN A TURBULENT PIPE FLOW WITH UNIFORM FLUID INJECTION AND SUCTION THROUGH THE WALL
TOKURO MIZUSHINAFUMIMARU OGINOSHUNJI TAKESHITA
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1975 Volume 8 Issue 3 Pages 217-223

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Abstract

A theoretical and experimental study was conducted on a fully developed turbulent pipe flow with uniform fluid injection or suction through the wall.
A simple model was used to analyze the effect of injection or suction on the eddy diffusivity of momentum, friction factor and pressure gradient. The model predicts that both the normalized eddy diffusivity and local friction factor are linear functions of m/(-dp*/dx*), that is),
εM/vRe(-dp*/dx*)=F1(y/R)•m/(-dp*/dx*)+F2(y/R)
f(-dp*/dx*)=1/2+4m/(-dp*/dx*)
and that dp*/dx*=fn (m). Functions F1(y/R), F2(y/R) and fn(m) were determined by experiment.
The experimental runs were executed at Re=15, 200-95, 300 with wall flux ratio m=vW/<u>=-0.0042-0.00847.

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© The Society of Chemical Engineers, Japan
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