Abstract
Three-dimensional direct numerical simulations of a viscous incompressible fluid flow through a helical pipe with a circular cross section were conducted for three Reynolds numbers, Re (= 80, 300, and 1000), and two nondimensional curvatures, δ (= 0.1 and 0.05), over a wide range of torsion parameters, β (= nondimensional torsion=2 √2δ), from 0.02 to 2.8. Well-developed axially invariant regions were obtained where the friction factors were calculated, in good agreement with the experimental data obtained by Yamamoto et al. [Fluid Dyn. Res. 16, 237 (1995)]. It was found that the friction factor sharply increases as β increases from zero, then decreases after taking a maximum, and finally slowly approaches that of a straight pipe when β tends to infinity. It is interesting that a peak of the friction factor exists in the region 0.2 ≤ β ≤ 0.3 for all the Reynolds numbers and curvatures studied in the present paper, which manifests the importance of the torsion parameter in helical pipe flow.
| Original language | English |
|---|---|
| Article number | 064403 |
| Journal | Journal of the Physical Society of Japan |
| Volume | 86 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Jun 15 2017 |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
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Effect of Torsion on the Friction Factor of Helical Pipe Flow. / Datta, Anup Kumer; Yanase, Shinichiro; Hayamizu, Yasutaka; Kouchi, Toshinori; Nagata, Yasunori; Yamamoto, Kyoji.
In: Journal of the Physical Society of Japan, Vol. 86, No. 6, 064403, 15.06.2017.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effect of Torsion on the Friction Factor of Helical Pipe Flow
AU - Datta, Anup Kumer
AU - Yanase, Shinichiro
AU - Hayamizu, Yasutaka
AU - Kouchi, Toshinori
AU - Nagata, Yasunori
AU - Yamamoto, Kyoji
PY - 2017/6/15
Y1 - 2017/6/15
N2 - Three-dimensional direct numerical simulations of a viscous incompressible fluid flow through a helical pipe with a circular cross section were conducted for three Reynolds numbers, Re (= 80, 300, and 1000), and two nondimensional curvatures, δ (= 0.1 and 0.05), over a wide range of torsion parameters, β (= nondimensional torsion=2 √2δ), from 0.02 to 2.8. Well-developed axially invariant regions were obtained where the friction factors were calculated, in good agreement with the experimental data obtained by Yamamoto et al. [Fluid Dyn. Res. 16, 237 (1995)]. It was found that the friction factor sharply increases as β increases from zero, then decreases after taking a maximum, and finally slowly approaches that of a straight pipe when β tends to infinity. It is interesting that a peak of the friction factor exists in the region 0.2 ≤ β ≤ 0.3 for all the Reynolds numbers and curvatures studied in the present paper, which manifests the importance of the torsion parameter in helical pipe flow.
AB - Three-dimensional direct numerical simulations of a viscous incompressible fluid flow through a helical pipe with a circular cross section were conducted for three Reynolds numbers, Re (= 80, 300, and 1000), and two nondimensional curvatures, δ (= 0.1 and 0.05), over a wide range of torsion parameters, β (= nondimensional torsion=2 √2δ), from 0.02 to 2.8. Well-developed axially invariant regions were obtained where the friction factors were calculated, in good agreement with the experimental data obtained by Yamamoto et al. [Fluid Dyn. Res. 16, 237 (1995)]. It was found that the friction factor sharply increases as β increases from zero, then decreases after taking a maximum, and finally slowly approaches that of a straight pipe when β tends to infinity. It is interesting that a peak of the friction factor exists in the region 0.2 ≤ β ≤ 0.3 for all the Reynolds numbers and curvatures studied in the present paper, which manifests the importance of the torsion parameter in helical pipe flow.
UR - http://www.scopus.com/inward/record.url?scp=85020756999&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85020756999&partnerID=8YFLogxK
U2 - 10.7566/JPSJ.86.064403
DO - 10.7566/JPSJ.86.064403
M3 - Article
AN - SCOPUS:85020756999
VL - 86
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 6
M1 - 064403
ER -