TURBULENT NATURAL CONVECTION IN A COMPOSITE ENCLOSURE USING THE THERMAL NON-EQUILIBRIUM MODEL

被引：0
|
作者：
deLemos, Marcelo J. S. [1 ]
Masciarelli, Caio B. [1 ]
机构：
[1] ITA, Dept Energia IEME, BR-12228900 Sao Jose Dos Campos, SP, Brazil
来源：
PROCEEDINGS OF THE ASME SUMMER HEAT TRANSFER CONFERENCE, 2016, VOL 1 | 2016年
关键词：
HEAT-TRANSFER; FLOW;
D O I：
暂无
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Turbulent natural convection in a two-dimensional horizontal composite square cavity is numerically analyzed using the finite volume method and the thermal non-equilibrium approach. Distinct energy equations for the working fluid and for the porous matrix are proposed reflecting different energy balances for each phase. The composite square cavity is formed by three distinct regions, namely, deaf, porous and solid region. It was found that the fluid begins to permeate the porous medium for values of Ra greater than 10(boolean AND)6. Nusselt number values show that for the range of Ra analyzed there are no significant variation between the laminar and turbulent model solution. When comparing the effects of Ra and Da on Nu, results indicate that the solid phase properties have a greater influence in enhancing the overall heat transferred trough the cavity.
引用
收藏
页数：7
相关论文
共 50 条
  • [41] Thermal non-equilibrium natural convection in a trapezoidal porous cavity with heated cylindrical obstacles
    Khan, Z. H.
    Hamid, Muhammad
    Khan, W. A.
    Sun, L.
    Liu, H.
    INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, 2021, 126
  • [42] A thermal non-equilibrium model with Cattaneo effect for convection in a Brinkman porous layer
    Shivakumara, I. S.
    Ravisha, M.
    Ng, Chiu-On
    Varun, V. L.
    INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS, 2015, 71 : 39 - 47
  • [43] Magneto Convection in Rotating Nanofluid Layer: Local Thermal Non-Equilibrium Model
    Ahuja, J.
    Gupta, U.
    JOURNAL OF NANOFLUIDS, 2019, 8 (02) : 430 - 438
  • [44] Chebyshev spectral element method for natural convection in a porous cavity under local thermal non-equilibrium model
    Wang, Yazhou
    Qin, Guoliang
    He, Wenqiang
    Bao, Zhenzhong
    INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2018, 121 : 1055 - 1072
  • [45] Double-diffusive magneto-natural convection of nanofluid in an enclosure equipped with a wavy porous cylinder in the local thermal non-equilibrium situation
    Tayebi, Tahar
    Dahmane, Fatima
    Jamshed, Wasim
    Chamkha, Ali J.
    El Din, Sayed M.
    Raizah, Zehba
    CASE STUDIES IN THERMAL ENGINEERING, 2023, 43
  • [46] A solid-liquid local thermal non-equilibrium lattice Boltzmann model for heat transfer in nanofluids. Part II: Natural convection of nanofluids in a square enclosure
    Wang, Dongmin
    Cheng, Ping
    Quan, Xiaojun
    INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2019, 130 : 1358 - 1365
  • [47] Optimizing magnetic-natural convection using anisotropic porous media: A local thermal non-equilibrium approach
    Izadi, Mohsen
    Sheremet, Mikhail A.
    Hajjar, Ahmad
    Alqurashi, Faris
    Mahariq, Ibrahim
    PHYSICS OF FLUIDS, 2025, 37 (03)
  • [48] Unsteady natural convection in a partially porous cavity having a heat-generating source using local thermal non-equilibrium model
    Astanina, Marina S.
    Sheremet, Mikhail
    Umavathi, C. Jawali
    INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW, 2019, 29 (06) : 1902 - 1919
  • [49] Numerical analysis of local thermal non-equilibrium free convection in a porous enclosure with a wavy cold side wall
    Barman, Prabir
    Rao, Pentyala Srinivasa
    PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART E-JOURNAL OF PROCESS MECHANICAL ENGINEERING, 2024, 238 (01) : 372 - 382
  • [50] Finite amplitude convection and heat transfer in inclined porous layer using a thermal non-equilibrium model
    Ouarzazi, M. N.
    Hirata, S. C.
    Barletta, A.
    Celli, Michele
    INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2017, 113 : 399 - 410
12345