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research-article

Numerical study of turbulent helical pipe flows with comparison to the experimental results

[+] Author and Article Information
Anup Kumer DATTA

Graduate School of Natural science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita-Ku, Okayama, 700-8530, Japan
akd_math_02@yahoo.com

Yasutaka HAYAMIZU

National Institute of Technology, Yonago College, 4448 Hikona-cho, Yonago-shi, Tottori 683-8502, Japan
hayamizu@yonago-k.ac.jp

Toshinori KOUCHI

Graduate School of Natural science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita-Ku, Okayama, 700-8530, Japan
kouchi@mech.okayama-u.ac.jp

Yasunori NAGATA

Graduate School of Natural science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita-Ku, Okayama, 700-8530, Japan
ynagata@okayama-u.ac.jp

Kyoji YAMAMOTO

Graduate School of Natural science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita-Ku, Okayama, 700-8530, Japan
tetsukyo8801@earth.ocn.ne.jp

Shinichiro YANASE

Graduate School of Natural science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita-Ku, Okayama, 700-8530, Japan
yanase@mech.okayama-u.ac.jp

1Corresponding author.

ASME doi:10.1115/1.4036477 History: Received August 07, 2016; Revised April 05, 2017

Abstract

Turbulent flows through helical pipes with circular cross section are numerically investigated comparing with the experimental results obtained by our team. Numerical calculations are carried out for two helical circular pipes having different pitches and the same non-dimensional curvature δ (= 0.1) over a wide range of the Reynolds number, Re, from 3000 to 21000 for torsion parameter ß (= torsion /

2δ
= 0.02 and 0.45). We numerically obtained the secondary flow, the axial flow and the intensity of the turbulent kinetic energy by use of three turbulence models incorporated in OpenFOAM. We found that RNG k-ε turbulence model can predict excellently the fully developed turbulent flow with comparison to the experimental data. It is found that the momentum transfer due to turbulence dominates the secondary flow pattern of the turbulent helical pipe flow. It is interesting that torsion effect is more remarkable for turbulent flows than laminar flows.

Copyright (c) 2017 by ASME
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