This paper is directed at the important contribution to fluid dynamics made by Johan Nikuradze. His seminal paper published in 1933 represents the gold standard of empty conduit permeability, for the flow of water through roughened pipes, even to this very day. We revisit in some detail the “inflection profile” in Nikuradze’s plot, which appears in the curve for his roughened data found in Figure 9 in that publication. In so doing, we show that the data points at low Reynolds number values, and particularly those surrounding the value of 3.4 approximately on the x-axis of his plot, do not represent the reported experimental results found in his tables of data. Furthermore, we also demonstrate that this discrepancy in his original paper is very problematic because it forms the basis for many subsequent scholarly works. As a result, this inflection profile has become erroneously embedded in conventional folklore concerning fluid flow in closed conduits and has enjoyed widespread acceptance as being a legitimate feature of fluid dynamics dogma. With the advent recently of Quinn’s Law, a novel approach to the understanding of fluid flow in closed conduits, we are able to articulate in a manner not heretofore possible, the significance of this discrepancy which is far too important to ignore.
Published in | Fluid Mechanics (Volume 6, Issue 1) |
DOI | 10.11648/j.fm.20200601.11 |
Page(s) | 1-14 |
Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
Copyright |
Copyright © The Author(s), 2020. Published by Science Publishing Group |
Inflection Profile, Nikuradze, Friction Factor, Transition Region, Turbulent Flow, Wall Effect, Boundary Layer
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[6] | Mckeon, B. J., Swanson, C. J., Zagarola, M. V., Donnelly, R. J., and Smits, A. J., Friction factor for smooth pipe flow., J. Fluid Mech. (2005), vol. 238, pp. 429-443. Cambridge University Press; DO1; 10.1017/S0022112005005501. |
[7] | Nikuradze, J., NASA TT F-10, 359, Laws of Turbulent Flow in Smooth Pipes. Translated from “Gesetzmassigkeiten der turbulenten Stromung in glatten Rohren” VDI (Verein Deutsher Ingenieure)-Forschungsheft 356. |
[8] | Kozeny, J., "Uber kapillare Leitung des wassers in Boden," Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften, vol. 136, 1927. |
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[10] | Quinn, H. M., A Reconciliation of Packed Column Permeability Data: Deconvoluting the Ergun Papers. Journal of Materials Volume 2014 (2014), Article ID 548482, 24 pages http://dx.doi.org/10.1155/2014/548482. |
[11] | Ergun, S. and Orning, A. A., Fluid Flow through Randomly Packed Columns and Fluidized Beds, Ind. Eng. Chem. vol. 41, pp. 1179, 1949. |
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[15] | Quinn, H. M., A Reconciliation of Packed Column Permeability Data: Column Permeability as a Function of Particle Porosity; Journal of Materials Volume 2014 (2014), Article ID 636507, 22 pages http://dx.doi.org/10.1155/2014/636507. |
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APA Style
Hubert Michael Quinn. (2020). Quinn’s Law of Fluid Dynamics: Supplement #1 Nikuradze’s Inflection Profile Revisited. Fluid Mechanics, 6(1), 1-14. https://doi.org/10.11648/j.fm.20200601.11
ACS Style
Hubert Michael Quinn. Quinn’s Law of Fluid Dynamics: Supplement #1 Nikuradze’s Inflection Profile Revisited. Fluid Mech. 2020, 6(1), 1-14. doi: 10.11648/j.fm.20200601.11
AMA Style
Hubert Michael Quinn. Quinn’s Law of Fluid Dynamics: Supplement #1 Nikuradze’s Inflection Profile Revisited. Fluid Mech. 2020;6(1):1-14. doi: 10.11648/j.fm.20200601.11
@article{10.11648/j.fm.20200601.11, author = {Hubert Michael Quinn}, title = {Quinn’s Law of Fluid Dynamics: Supplement #1 Nikuradze’s Inflection Profile Revisited}, journal = {Fluid Mechanics}, volume = {6}, number = {1}, pages = {1-14}, doi = {10.11648/j.fm.20200601.11}, url = {https://doi.org/10.11648/j.fm.20200601.11}, eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.fm.20200601.11}, abstract = {This paper is directed at the important contribution to fluid dynamics made by Johan Nikuradze. His seminal paper published in 1933 represents the gold standard of empty conduit permeability, for the flow of water through roughened pipes, even to this very day. We revisit in some detail the “inflection profile” in Nikuradze’s plot, which appears in the curve for his roughened data found in Figure 9 in that publication. In so doing, we show that the data points at low Reynolds number values, and particularly those surrounding the value of 3.4 approximately on the x-axis of his plot, do not represent the reported experimental results found in his tables of data. Furthermore, we also demonstrate that this discrepancy in his original paper is very problematic because it forms the basis for many subsequent scholarly works. As a result, this inflection profile has become erroneously embedded in conventional folklore concerning fluid flow in closed conduits and has enjoyed widespread acceptance as being a legitimate feature of fluid dynamics dogma. With the advent recently of Quinn’s Law, a novel approach to the understanding of fluid flow in closed conduits, we are able to articulate in a manner not heretofore possible, the significance of this discrepancy which is far too important to ignore.}, year = {2020} }
TY - JOUR T1 - Quinn’s Law of Fluid Dynamics: Supplement #1 Nikuradze’s Inflection Profile Revisited AU - Hubert Michael Quinn Y1 - 2020/02/18 PY - 2020 N1 - https://doi.org/10.11648/j.fm.20200601.11 DO - 10.11648/j.fm.20200601.11 T2 - Fluid Mechanics JF - Fluid Mechanics JO - Fluid Mechanics SP - 1 EP - 14 PB - Science Publishing Group SN - 2575-1816 UR - https://doi.org/10.11648/j.fm.20200601.11 AB - This paper is directed at the important contribution to fluid dynamics made by Johan Nikuradze. His seminal paper published in 1933 represents the gold standard of empty conduit permeability, for the flow of water through roughened pipes, even to this very day. We revisit in some detail the “inflection profile” in Nikuradze’s plot, which appears in the curve for his roughened data found in Figure 9 in that publication. In so doing, we show that the data points at low Reynolds number values, and particularly those surrounding the value of 3.4 approximately on the x-axis of his plot, do not represent the reported experimental results found in his tables of data. Furthermore, we also demonstrate that this discrepancy in his original paper is very problematic because it forms the basis for many subsequent scholarly works. As a result, this inflection profile has become erroneously embedded in conventional folklore concerning fluid flow in closed conduits and has enjoyed widespread acceptance as being a legitimate feature of fluid dynamics dogma. With the advent recently of Quinn’s Law, a novel approach to the understanding of fluid flow in closed conduits, we are able to articulate in a manner not heretofore possible, the significance of this discrepancy which is far too important to ignore. VL - 6 IS - 1 ER -