...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Heat Transfer Engineering >Effects of Non-Darcian and Inlet Conditions on the Forced Convection Along a Vertical Plate With Film Evaporation
【24h】

Effects of Non-Darcian and Inlet Conditions on the Forced Convection Along a Vertical Plate With Film Evaporation

机译：非达西和入口条件对垂直蒸发薄膜对流强迫对流的影响

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 analyzes theoretically the non-Darcian effects and inlet conditions of forced convection flow with liquid film evaporation in a porous medium. The physical scheme includes a liquid-air streams combined system; the liquid film falls down along the plate and is exposed to a cocurrent forced moist air stream. The axial momentum, energy, and concentration equations for the air and water flows are developed based on the steady two-dimensional (2-D) laminar boundary layer model. The non-Darcian convective, boundary, and inertia effects are considered to describe the momentum characteristics of a porous medium. The paper clearly describes the temperature and mass concentration variations at the liquid-air interface and provides the heat and mass transfer distributions along the heated plate. Then, the paper further evaluates the non-Darcian effects and inlet conditions on the heat transfer and evaporating rate of liquid film evaporation. The numerical results show that latent heat transfer plays the dominant heat transfer role. Carrying out a parametric analysis indicates that higher air Reynolds number, higher wetted wall temperature, and lower moist air relative humidity will produce a better evaporating rate and heat transfer rate. In addition, a non-Darcy model should be adopted in the present study. The maximum error for predictions of heat and mass transfer performance will be 21% when the Darcy model is used.
机译：本研究从理论上分析了多孔介质中液膜蒸发对流的非达西效应和入口条件。物理方案包括液-气混合系统；液膜沿平板下落，并暴露在并流的强制潮湿空气流中。基于稳定的二维（2-D）层流边界层模型，开发了空气和水流的轴向动量，能量和浓度方程。非达西对流，边界和惯性效应被认为可以描述多孔介质的动量特性。该论文清楚地描述了液-气界面处的温度和质量浓度变化，并提供了沿加热板的传热和传质分布。然后，本文进一步评估了非达西效应和入口条件对液膜蒸发的传热和蒸发速率的影响。数值结果表明，潜热传递起主导作用。进行参数分析表明，较高的空气雷诺数，较高的湿壁温度和较低的湿空气相对湿度将产生较好的蒸发速率和传热速率。另外，本研究应采用非达西模型。当使用达西模型时，预测传热和传质性能的最大误差为21％。

著录项

  • 来源
    《Heat Transfer Engineering》 |2011年第12期|p.981-987|共7页
  • 作者

    JIN-SHENG LEU; JIIN-YUH JANG; WEN-CHENG CHOU;

  • 作者单位

    Department of Aircraft Engineering, Air Force Institute of Technology, Kaohsiung County, Taiwan;

    Department of Mechanical Engineering, National Cheng-Kung University, Tainan, Taiwan;

    Department of Mechanical Engineering, National Cheng-Kung University, Tainan, Taiwan;

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

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