Flow pattern and model development for coaxially placed entry region coil-disc assembly as turbulence promoter in circular conduits

• Published in: Experimental thermal and fluid science Vol. 32; no. 8; pp. 1748 - 1753
• Main Authors: Mohan, Vaka Murali, Rajendra Prasad, P., Sujatha, V., Sarveswara Rao, S.
• Format: Journal Article
• Language: English
• Published: New York, NY Elsevier Inc 01-09-2008; Elsevier Science
• Subjects: Applied sciences; Chemical engineering; Circular conduit; Coiling; Computational fluid dynamics; Disc; Entry region coil; Exact sciences and technology; Fluid flow; Mass transfer; Mathematical analysis; Mathematical models; Modeling; Reactors; Turbulence; Turbulence promoter; Turbulent flow; Entry region coil; Disc; Modeling; Mass transfer; Circular conduit; Turbulence promoter; Turbulence generator; Pipe flow; Circular pipe; Coil tube; Electrochemical reactor; Disk
• ISSN: 0894-1777; 1879-2286
• DOI: 10.1016/j.expthermflusci.2008.04.002

Flow pattern and model development for coaxially placed entry region coil-disc as turbulence promoter in circular conduit have been presented in this paper. The electrolyte was equimolal potassium ferricyanide, potassium ferrocyanide and excess sodium hydroxide. The mass transfer correlation is based on law of the wall similarity. The variables covered in this study are the flow rate of the electrolyte, the geometric parameters of the promoter – pitch of the coil from 0.015
m to 0.035
m, length of the coil 0.01
m to 0.125
m, disc diameter from 0.02
m to 0.04
m, height of the disc from 0
m to 0.50
m, velocity of the fluid from 0.0591
m/s to 0.2751
m/s. The correlation may be extended to a wider range of parameters by virtue of the law of the wall. Experimental mass transfer function in terms of geometric parameters have been developed and presented.
g
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=
5.76
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Re
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-
0.003
P
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0.003
L
c
d
0.001
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0.616
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