• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Mechanics & Industry >Numerical study of natural and mixed convection in a square cavity filled by a Cu-water nanofluid with circular heating and cooling cylinders
【24h】

Numerical study of natural and mixed convection in a square cavity filled by a Cu-water nanofluid with circular heating and cooling cylinders

机译：用圆形加热和冷却缸填充Cu水纳米流体的平方腔中自然和混合对流的数值研究

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

The present study investigates the role of natural and mixed convection heat transfer of a Cu-water nanofluid in a square cavity with inside circular heating and cooling bodies. The finite volume discretization method with the Semi-Implicit Method for Pressure Linked Equations algorithm is employed for solving the two-dimensional Navier-Stokes and energy equations. The effects of various design parameters on the heat transfer rate are investigated. Design parameters used in this numerical simulation are the position and size of circular bodies. A wide range of parameters such as the Rayleigh number (10(3) <= Ra <= 10(6)), volume fraction (0 <= phi <= 0.05), Richardson number (0.01 <= Ri <= 1000), and the Grashof number (10(2) <= Gr <= 10(4)) has been used. The numerical analysis is carried out for the circular body's positions on the vertical centerline of the cavity. The circular body's positions on the vertical left-line of the cavity are also presented and discussed for comparison purposes. The results show that the optimal heat transfer is obtained when placing the circular body near the bottom wall. Furthermore, the effects of pair of circular bodies on the heat transfer rate are investigated. The simulations show that the heat transfer rate increases with changing the orientation of the pair of circular bodies from the horizontal to the vertical directions. For the case of the mixed convection process, it is found that at high Richardson numbers, the effect of moving walls decreases and the heat transfer rate changes significantly.
机译：本研究研究了Cu水纳米流体在方形腔内的天然和混合对流传热的作用，内腔腔内圆形加热和冷却体。采用具有半隐式方法的有限体积离散化方法，用于求解二维Navier-Stokes和能量方程。研究了各种设计参数对传热速率的影响。本数值模拟中使用的设计参数是圆形体的位置和尺寸。广泛的参数，如瑞利数（10（3）<= Ra <= 10（6）），体积分数（0 <= PHI <= 0.05），Richardson号（0.01 <= RI <= 1000），并且使用了GRASHOF编号（10（2）<= GR <= 10（4））。在腔垂直中心线上对圆形体的位置进行数值分析。还呈现并讨论腔垂直左线上的圆形体的位置以进行比较目的。结果表明，当将圆形体放置在底壁附近时，获得最佳热传递。此外，研究了一对圆形体对传热速率的影响。模拟表明，传热速率随着从水平到垂直方向而改变一对圆形体的方向而增加。对于混合对流过程的情况，发现在高理查森数量，移动壁的效果降低，传热速率显着变化。

著录项

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