IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v16y2023i21p7314-d1269555.html
   My bibliography  Save this article

Heat Transfer Characteristics of Turbulent Flow in Double-90°-Bend Pipes

Author

Listed:
  • Yuki Kato

    (Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima 739-0046, Japan)

  • Kenmei Fujimoto

    (Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima 739-0046, Japan)

  • Guanming Guo

    (Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima 739-0046, Japan)

  • Mikimasa Kawaguchi

    (Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima 739-0046, Japan)

  • Masaya Kamigaki

    (Mazda Motor Corporation, 3-1 Shinchi, Fuchu-cho, Hiroshima 730-8670, Japan)

  • Masanobu Koutoku

    (Mazda Motor Corporation, 3-1 Shinchi, Fuchu-cho, Hiroshima 730-8670, Japan)

  • Hitoshi Hongou

    (Mazda Motor Corporation, 3-1 Shinchi, Fuchu-cho, Hiroshima 730-8670, Japan)

  • Haruna Yanagida

    (Mazda Motor Corporation, 3-1 Shinchi, Fuchu-cho, Hiroshima 730-8670, Japan)

  • Yoichi Ogata

    (Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima 739-0046, Japan)

Abstract

This study evaluates the heat dissipation and Nusselt number for an S-shaped double-bend pipe, for which an experimental evaluation is lacking. In terms of the velocity field, the mean velocity and turbulent kinetic energy were measured through particle image velocimetry. Heat transfer characteristics were evaluated in validated conjugate heat transfer simulations, and a k - ω SST turbulence model was used for flow simulation inside the pipe. Heat transfer enhancement was observed at the first bend, as observed in previous studies on single-bend and U-shaped bends, whereas no heat transfer enhancement was observed at the second bend. This result was due to higher turbulent heat flux at the first bend because of higher eddy diffusion on the outside of the bend, whereas eddy diffusion was lower on the outside of the second bend owing to the history of the first bend. The heat transfer characteristics of the S-shaped double-bend pipe elucidated in this study provide valuable insight for devising strategies to reduce heat loss in automotive exhaust pipes with multiple bends. Furthermore, the conjugate heat transfer simulation model used in this study provides a benchmark for heat transfer calculations for multi-bend pipes.

Suggested Citation

  • Yuki Kato & Kenmei Fujimoto & Guanming Guo & Mikimasa Kawaguchi & Masaya Kamigaki & Masanobu Koutoku & Hitoshi Hongou & Haruna Yanagida & Yoichi Ogata, 2023. "Heat Transfer Characteristics of Turbulent Flow in Double-90°-Bend Pipes," Energies, MDPI, vol. 16(21), pages 1-25, October.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:21:p:7314-:d:1269555
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/16/21/7314/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1996-1073/16/21/7314/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Yan Wang & Quanlin Dong & Pengfei Wang, 2015. "Numerical Investigation on Fluid Flow in a 90-Degree Curved Pipe with Large Curvature Ratio," Mathematical Problems in Engineering, Hindawi, vol. 2015, pages 1-12, August.
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Guanming Guo & Masaya Kamigaki & Qiwei Zhang & Yuuya Inoue & Keiya Nishida & Hitoshi Hongou & Masanobu Koutoku & Ryo Yamamoto & Hieaki Yokohata & Shinji Sumi & Yoichi Ogata, 2020. "Experimental Study and Conjugate Heat Transfer Simulation of Turbulent Flow in a 90° Curved Square Pipe," Energies, MDPI, vol. 14(1), pages 1-21, December.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jeners:v:16:y:2023:i:21:p:7314-:d:1269555. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.