IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v16y2023i13p5045-d1182688.html
   My bibliography  Save this article

Separated Liquid–Vapor Flow Analysis in a Mini-Channel with Mesh Walls in the Closed-Loop Two-Phase Wicked Thermosyphon (CLTPWT)

Author

Listed:
  • Karthik S. Remella

    (Department of Mechanical & Materials Engineering, University of Cincinnati, Cincinnati, OH 45221, USA
    Current address: Ansys Inc., Waltham, MA 02451, USA.)

  • Frank M. Gerner

    (Department of Mechanical & Materials Engineering, University of Cincinnati, Cincinnati, OH 45221, USA)

Abstract

A metallic wire mesh screen, wire diameter of approximately 50 μm, is folded into ~80 “accordion-shaped” mini-channels and placed inside the evaporator package of a novel passive thermal management device for cooling overhead light-emitting diodes (LEDs) used in factory floors and high-bay facilities. The thermal power dissipated via these devices ranges between 75 W and 171 W. The channel walls (screen) wick liquid water from the porous wick (located centrally above the screen) and facilitate its evaporation. The closed-loop tests on this device confirm that the two-phase mixture quality exiting the evaporator is approximately 0.2. This paper presents a steady-state numerical model of this separated liquid–vapor flow in a single mini-rectangular channel (900 μm × 2000 μm, 4 cm long) with wire mesh-screen walls. The primary objective of the model is to estimate the pressure drops occurring in this two-phase flow. The model initially assumes a flat liquid–vapor interface along the channel and uses an iterative approach to estimate its final meniscus shape (curvature). In addition to the temperature distribution along the screen walls, this paper also discusses the velocity and pressure distributions in both liquid and vapor regions. It also helps understand the liquid–vapor interfacial shear in this flow configuration and proposes a flow-limiting condition for the device by predicting flow reversal in the channel.

Suggested Citation

  • Karthik S. Remella & Frank M. Gerner, 2023. "Separated Liquid–Vapor Flow Analysis in a Mini-Channel with Mesh Walls in the Closed-Loop Two-Phase Wicked Thermosyphon (CLTPWT)," Energies, MDPI, vol. 16(13), pages 1-18, June.
  • Handle: RePEc:gam:jeners:v:16:y:2023:i:13:p:5045-:d:1182688
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/16/13/5045/pdf
    Download Restriction: no

    File URL: https://www.mdpi.com/1996-1073/16/13/5045/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Essam M. Abo-Zahhad & Chaouki Ghenai & Ali Radwan & Osama Abdelrehim & Mohamed S. Salem & Mohamed R. Elmarghany & Asmaa Khater & Mahmoud A. Shouman, 2022. "A Micro-Metal Inserts Based Microchannel Heat Sink for Thermal Management of Densely Packed Semiconductor Systems," Sustainability, MDPI, vol. 14(21), pages 1-17, October.
    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.

      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:13:p:5045-:d:1182688. 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.