• Login
    View Item 
    •   Shocker Open Access Repository Home
    • Engineering
    • Mechanical Engineering
    • ME Research Publications
    • View Item
    •   Shocker Open Access Repository Home
    • Engineering
    • Mechanical Engineering
    • ME Research Publications
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Enhanced wickability of single-columnar, non-uniform pore-size wick using Lattice Boltzmann method

    Date
    2022-03-08
    Author
    Borumand, Mohammad
    Lee, Taehun
    Hwang, Gisuk
    Metadata
    Show full item record
    Citation
    Borumand, M., Lee, T., & Hwang, G. (2022, March 2). Enhanced wickability of single-columnar, non-uniform pore-size wick using lattice Boltzmann method. Computers & Fluids. Retrieved May 5, 2022, from https://www.sciencedirect.com/science/article/abs/pii/S0045793022000548?via%3Dihub
    Abstract
    Optimal wick designs are essential to develop high heat flux two-phase thermal management systems in various applications including miniaturized power electronics, energy, high power battery, and spacecraft systems, as they require both large permeability and improved capillary pressure, i.e., enhanced wickability. The enhanced wickability is examined using non-uniform pore size wicks, while the larger pores increase the permeability and the smaller pores improve the capillary pressure. A two-phase single component free-energy-based Lattice Boltzmann Method (LBM) is employed to study the enhanced wickability, i.e., pore-scale rate-of-rise through wicks. The rate-of-rise is predicted for uniform and non-uniform pore size wicks having a single-column-particle between the two parallel plates for given porosities (ε = 0.67 and 0.8) and pore size ratios (lr = 1.3 and 2.6). The study shows that the non-uniform pore size wicks enhance the rate-of-rise and capillary pressure up to 298 and 157%, respectively, compared to those of the uniform pore size wicks, by improving the permeability through larger pores and increased capillary pumping capability through smaller pores. Also, the wickability enhances as the pore size ratios increase at given porosity or the porosity decreases at given pore size ratio. The cumulative enhancements of the maximum/minimum dimensionless liquid heights and the liquid saturation of non-uniform pore size wick are found to be up to 90, 114, and 112%, respectively, at ε = 0.67 and lr = 2.6. The capillary pressure enhancement of non-uniform particle size wicks results from the presence of the small pores. Also, the vertically graded wicks increase the capillary pressure due to the smaller pores at the top of the wicks, while they marginally decrease the rate-of-rise compared to the non-uniform pore size wicks at given porosity and pore size ratio. The simulation results provide insights into the optimal thin wick structures for high heat flux two-phase thermal management system by enhancing the wickability through the non-uniform pore sizes.
    Description
    Click on the DOI to access this article (may not be free).
    URI
    https://doi.org/10.1016/j.compfluid.2022.105376
    https://soar.wichita.edu/handle/10057/22824
    Collections
    • ECE Research Publications
    • ME Research Publications

    Browse

    All of Shocker Open Access RepositoryCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsBy TypeThis CollectionBy Issue DateAuthorsTitlesSubjectsBy Type

    My Account

    LoginRegister

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    DSpace software copyright © 2002-2023  DuraSpace
    DSpace Express is a service operated by 
    Atmire NV