• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Heat and Mass Transfer >Regimes of heat transfer in finite-size particle suspensions
【24h】

Regimes of heat transfer in finite-size particle suspensions

机译：有限尺寸粒子悬浮液中的传热制度

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We present results of interface-resolved simulations of heat transfer in suspensions of finite-size neutrally-buoyant spherical particles for solid volume fractions up to 35% and bulk Reynolds numbers from 500 to 5600. An Immersed Boundary-Volume of Fluid method is used to solve the energy equation in the fluid and solid phase. We relate the heat transfer to the regimes of particle motion previously identified, i.e. a viscous regime at low volume fractions and low Reynolds number, particle-laden turbulence at high Reynolds and moderate volume fraction and particulate regime at high volume fractions. We show that in the viscous dominated regime, the heat transfer is mainly due to thermal diffusion with enhancement due to the particle-induced fluctuations. In the turbulent-like regime, we observe the largest enhancement of the global heat transfer, dominated by the turbulent heat flux. In the particulate shear-thickening regime, however, the heat transfer enhancement decreases as mixing is quenched by the particle migration towards the channel core. As a result, a compact loosely-packed core region forms and the contribution of thermal diffusion to the total heat transfer becomes significant once again. The global heat transfer becomes, in these flows at volume fractions larger than 25%, lower than in single phase turbulence.
机译：我们呈现接口解决模拟的接口分辨模拟，其有限尺寸中性浮球球颗粒的悬浮液，用于固体体积分数，高达35％，500至5600的大量雷诺数。浸入的流体方法的浸入式边界体积解决流体和固相中的能量方程。我们将传热与先前鉴定的颗粒运动的传热相关，即低体积分数的粘性状态和低雷诺数，高雷诺下的颗粒卷绕湍流和高体积分数的中等体积分数和颗粒状态。我们表明，在粘性主导地区，传热主要是由于由于粒子引起的波动而具有增强的热扩散。在湍流的制度中，我们观察到全球传热的最大增强，由湍流热通量主导。然而，在颗粒状剪切增厚状态下，通过朝向通道芯的颗粒迁移淬灭混合淬灭，传热增强降低。结果，紧凑的松散填充的核心区域形式和热扩散对总热传递的贡献再次变得显着。在这些体积级分的这些流量中，全局传热变为大于25％，低于单相湍流。

著录项

  • 来源
    《International Journal of Heat and Mass Transfer》 |2021年第10期|121514.1-121514.14|共14页
  • 作者

    Ali Yousefi; Mehdi Niazi Ardekani; Francesco Picano; Luca Brandt;

  • 作者单位

    Linne FLOW Centre and SeRC (Swedish e-Sdence Research Centre) KTH Department of Engineering Mechanics SE-10044 Stockholm Sweden;

    Linne FLOW Centre and SeRC (Swedish e-Sdence Research Centre) KTH Department of Engineering Mechanics SE-10044 Stockholm Sweden Department of Chemical Engineering Stanford University Stanford CA 94305 USA;

    Department of Industrial Engineering University of Padova Via Venezia 1 35131 Padova Italy;

    Linne FLOW Centre and SeRC (Swedish e-Sdence Research Centre) KTH Department of Engineering Mechanics SE-10044 Stockholm Sweden Department of Energy and Process Engineering Norwegian University of Science and Technology (NTNU) Trondheim Norway;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Direct simulation; Heat transfer; Multiphase flow; Particle suspension;

    机译：直接仿真;传播热量;多相流动;颗粒悬浮液;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号