DOUBLE DIFFUSIVE NATURAL CONVECTION IN OPEN CAVITY UNDER THE SORET AND DUFOUR EFFECTS

被引:10
|
作者
Wang, Zhiyun [1 ]
Zhou, Zixuan [1 ]
Yang, Mo [1 ]
机构
[1] Univ Shanghai Sci & Technol, Sch Energy & Power Engn, Shanghai 200093, Peoples R China
来源
FRONTIERS IN HEAT AND MASS TRANSFER | 2020年 / 14卷
基金
中国国家自然科学基金;
关键词
open cavity; double diffusion; natural convection; Soret and Dufour effects; numerical simulation; HORIZONTAL CAVITY; ENCLOSURE;
D O I
10.5098/hmt.14.13
中图分类号
O414.1 [热力学];
学科分类号
摘要
Double diffusive natural convection in an open cavity under the Soret and Dufour effect is simulated numerically. The influences of different Rayleigh numbers (range from 10(3) to 10(7)), Lewis numbers (range from 0.5 to 8), buoyancy ratios (range from -5 to 5) and Soret and Dufour (range from 0 to 0.5) on the flow field, temperature and concentration distributions, as well as on the variation of the average Nusselt number and the average Sherwood number are investigated. The result shows that, when buoyancy ratios is -1, the average Nusselt number and the average Sherwood number reaches the minimum, namely the heat and mass transfer in the cavity are the weakest. The increase of Lewis numbers under a fixed Rayleigh numbers would lead to decreased the average Nusselt number and gradually increased the average Sherwood number. When the value of Rayleigh numbers is small, the change of Lewis numbers has little effect on heat and mass transfer. Both the average Nusselt number and the average Sherwood number increase as Soret and Dufour increase. When Dufour and Soret simultaneously varies from 0.1 to 0.5, compared with some cases, the Soret and Dufour effects are not considered, the average Nusselt number increases by 10.4% to 58.0% and the average Sherwood number increases by 3.4% to 13.1% respectively. In addition, the Soret and Dufour effect on the heat and mass transfer in open cavity is not obvious when Lewis numbers is 1.
引用
收藏
页码:1 / 7
页数:7
相关论文
共 50 条
  • [1] Unsteady Double Diffusive Natural Convection with Dufour and Soret Effects
    Ben Niche, Hamza
    Bouabdallah, Said
    Ghernaout, Badia
    Teggar, Mohamed
    INTERNATIONAL JOURNAL OF HEAT AND TECHNOLOGY, 2016, 34 (01) : 39 - 46
  • [2] Onset of double-diffusive convection in horizontal cavity with Soret and Dufour effects
    Wang, Jin
    Yang, Mo
    Zhang, Yuwen
    INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2014, 78 : 1023 - 1031
  • [3] Oscillatory double-diffusive convection in a horizontal cavity with Soret and Dufour effects
    Wang, Jin
    Yang, Mo
    He, Ya-Ling
    Zhang, Yuwen
    INTERNATIONAL JOURNAL OF THERMAL SCIENCES, 2016, 106 : 57 - 69
  • [4] SORET AND DUFOUR EFFECTS ON DOUBLE DIFFUSIVE NATURAL CONVECTION IN A CHAMBER UTILIZING NANOFLUID
    Nasrin, Rehena
    Alim, M. A.
    INTERNATIONAL JOURNAL OF HEAT AND TECHNOLOGY, 2012, 30 (01) : 109 - 117
  • [5] Double diffusive natural convection in a partially heated enclosure with Soret and Dufour effects
    Nithyadevi, N.
    Yang, Ruey-Jen
    INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW, 2009, 30 (05) : 902 - 910
  • [6] Soret and Dufour effects on unsteady double diffusive natural convection in porous trapezoidal enclosures
    Al-Mudhaf, Ali F.
    Rashad, A. M.
    Ahmed, Sameh E.
    Chamkha, Ali J.
    El-Kabeir, S. M. M.
    INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES, 2018, 140 : 172 - 178
  • [7] DOUBLE-DIFFUSIVE NATURAL CONVECTION OF LOW PRANDTL NUMBER LIQUIDS WITH SORET AND DUFOUR EFFECTS
    Qiu, Gang
    Yang, Mo
    Wang, Jin
    Zhang, Yuwen
    FRONTIERS IN HEAT AND MASS TRANSFER, 2018, 10
  • [8] Impact of nonuniform heated plate on double-diffusive natural convection of micropolar fluid in a square cavity with Soret and Dufour effects
    Muthtamilselvan, M.
    Periyadurai, K.
    Doh, Deog Hee
    ADVANCED POWDER TECHNOLOGY, 2018, 29 (01) : 66 - 77
  • [9] Influence of Soret and Dufour effects on entropy generation in transient double diffusive convection
    Hidouri, N.
    Ben Brahim, A.
    INTERNATIONAL JOURNAL OF EXERGY, 2010, 7 (04) : 454 - 481
  • [10] Soret and double diffusive convection in a porous cavity
    Boutana, N
    Bahloul, A
    Vasseur, P
    Joly, F
    JOURNAL OF POROUS MEDIA, 2004, 7 (01) : 41 - 57