...
首页> 外文期刊>Heat Transfer Engineering >Numerical Simulation of Forced Convection Enhancement in a Pipe by Porous Inserts
【24h】

Numerical Simulation of Forced Convection Enhancement in a Pipe by Porous Inserts

机译:多孔嵌件强化管道内对流的数值模拟

获取原文
获取原文并翻译 | 示例
           

摘要

The effect of porous inserts on forced convection in a circular pipe is investigated numerically. Two configurations are considered: A porous material is inserted at the core of the pipe, and an annulus porous material is attached to the inner wall. The flow inside the porous material is modeled using the Darcy-Brinkman-Forchheimer model. Effects of porous thickness, Darcy number, and thermal conductivity on the Nusselt number are investigated. In the first configuration, increasing porous thickness increases Nusselt number, and the value of porous thickness that maximizes Nusselt number varies from 0.8 to 0.95 as the value of Darcy number decreases from 10~(-3) to 10~(-6). In the second configuration, for low values of thermal conductivity, increasing the porous thickness decreases Nusselt number, and the porous thickness that achieves the lowest Nusselt number varies from 0.6 to 0.85 as the value of Darcy number decreases from 10~(-3) to 10~(-6). However, for high values of thermal conductivity, increasing porous thickness increases Nusselt number. At the expense of reasonable pressure drop, optimum thickness of porous material is found to be 0.6, which maximizes Nusselt number in the first configuration and minimizes it in the second configuration.
机译:数值研究了多孔插入物对圆管中强制对流的影响。考虑两种配置:将多孔材料插入管道的中心,并将环形多孔材料连接到内壁。使用Darcy-Brinkman-Forchheimer模型对多孔材料内部的流动进行建模。研究了多孔厚度,达西数和热导率对Nusselt数的影响。在第一种配置中,增加孔的厚度会增加Nusselt数,并且当Darcy值的值从10〜(-3)减少到10〜(-6)时,使Nusselt数最大化的多孔厚度的值在0.8到0.95之间变化。在第二种配置中,对于低的导热系数,增加孔的厚度会降低Nusselt数,并且当Darcy值的值从10〜(-3)减小至Ducky值时,达到最低Nusselt数的多孔厚度会从0.6变为0.85。 10〜(-6)。但是,对于高导热率值,增加多孔厚度会增加Nusselt数。以合理的压降为代价,发现多孔材料的最佳厚度为0.6,这在第一构造中使努塞尔数最大而在第二构造中使努塞尔数最小。

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