IDEAS home Printed from https://ideas.repec.org/a/eee/energy/v28y2003i8p809-823.html
   My bibliography  Save this article

Exergy destruction due to mean flow and fluctuating motion in incompressible turbulent flows through a tube

Author

Listed:
  • Wang, S.P.
  • Chen, Q.L.
  • Yin, Q.H.
  • Hua, B.

Abstract

The control volume method has been widely used to describe the rate of exergy destruction due to process irreversibility in a laminar fluid flow stream. In this work, we demonstrate that when the approach is applied to turbulent flows, and the fluid properties are based on averaged values, some information may be lost. We have applied the Reynolds time average method to the set of equations of exergy transfer for turbulent flows and found that the exergy destruction is mainly due to two factors, i.e. the mean flow dissipations and the fluctuating motion dissipations. As a case study, this result is used to model the incompressible turbulent flows through a duct with constant heat flux. The distributions of exergy destruction due to mean flow and fluctuating motion viscous dissipations as well as to mean flow and fluctuating motion heat transfer irreversibility in radial and in axis directions are obtained. The numerical solution of an example with water passing through the duct is obtained and the mechanisms of irreversibility analyzed. It is shown that for a given fluid, the total exergy destruction per unit length is a function of the geometrical parameters and the boundary conditions as well as the Reynolds number. It implies that the design of a thermal system can be optimized through minimizing the exergy destruction in the system.

Suggested Citation

  • Wang, S.P. & Chen, Q.L. & Yin, Q.H. & Hua, B., 2003. "Exergy destruction due to mean flow and fluctuating motion in incompressible turbulent flows through a tube," Energy, Elsevier, vol. 28(8), pages 809-823.
    • Handle: RePEc:eee:energy:v:28:y:2003:i:8:p:809-823
    DOI: 10.1016/S0360-5442(03)00006-9
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0360544203000069
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/S0360-5442(03)00006-9?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Wu, Shuang-Ying & Chen, Yan & Li, You-Rong & Zeng, Dan-Ling, 2007. "Exergy transfer characteristics of forced convective heat transfer through a duct with constant wall heat flux," Energy, Elsevier, vol. 32(5), pages 686-696.
    2. Wu, Shuang-Ying & Li, You-Rong & Chen, Yan & Xiao, Lan, 2007. "Exergy transfer characteristics of forced convective heat transfer through a duct with constant wall temperature," Energy, Elsevier, vol. 32(12), pages 2385-2395.

    More about this item

    Statistics

    Access and download statistics

    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:eee:energy:v:28:y:2003:i:8:p:809-823. 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.

    We have no bibliographic references for this item. You can help adding them by using 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: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/energy .

    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.