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Published in:

Volume 6 Issue 5
May-2019
eISSN: 2349-5162

Unique Identifier

JETIRCQ06054

Page Number

298-302

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Title

REFINING FRICTION COEFFICIENT RELATIONSHIPS FOR DI PIPES WITH ANALYTICAL TECHNIQUE

ISSN

2349-5162

Cite This Article

"REFINING FRICTION COEFFICIENT RELATIONSHIPS FOR DI PIPES WITH ANALYTICAL TECHNIQUE", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 5, page no.298-302, May - 2019, Available :http://www.jetir.org/papers/JETIRCQ06054.pdf

Abstract

With reference to Nikuradse’s experiments on artificially roughened pipes, friction coefficient relationships applicable to the five regions of flow are refined in this study using direct measurement of roughness of DI pipes. In case of considering friction factor value in five digits it was found that the first branching of Rz / D took place at Re = 2475 and all the branches took off at Re = 2975. In case of considering friction factor value in eleven digits, curves for higher Rz / D values, branches out above and away from the curve of Rz / D = 0.000005 which represents a smooth pipe in present case. It is clearly observed that the first branching of Rz / D took place at Re = 1775 and all the branches took off at Re = 1925. Thus it was proved that transitional turbulent flow occurred in the familiar laminar flow zone of Re upto 2000 in case friction factor values in eleven digits were considered. In case of friction factor value in five digits were considered then it occurred in the familiar transitional flow zone of Re = 2000 to 4000. The smooth turbulent flow did not occur when 4,000 < Re < 100000 but occurred when 1775 < Re < 5,40,000 . In the rough turbulent flow f is independent of Re. But it was found that even for 5,40,000 < Re < 19,01,000 f was dependent on Re but from practical consideration it could be said it was independent of Re .

Key Words

Friction factor, Reynolds number, Friction coefficient relationships

Cite This Article

"REFINING FRICTION COEFFICIENT RELATIONSHIPS FOR DI PIPES WITH ANALYTICAL TECHNIQUE", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp298-302, May - 2019, Available at : http://www.jetir.org/papers/JETIRCQ06054.pdf

Publication Details

Published Paper ID: JETIRCQ06054
Registration ID: 217241
Published In: Volume 6 | Issue 5 | Year May-2019
DOI (Digital Object Identifier):
Page No: 298-302
ISSN Number: 2349-5162

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Cite This Article

"REFINING FRICTION COEFFICIENT RELATIONSHIPS FOR DI PIPES WITH ANALYTICAL TECHNIQUE", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp298-302, May - 2019, Available at : http://www.jetir.org/papers/JETIRCQ06054.pdf




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