...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics >Effective property models for homogeneous two-phase flows
【24h】

Effective property models for homogeneous two-phase flows

机译：均相两相流的有效特性模型

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

Using an analogy between thermal conductivity of porous media and viscosity in two-phase flow, new definitions for two-phase viscosity are proposed. These new definitions satisfy the following two conditions: namely (i) the two-phase viscosity is equal to the liquid viscosity at the mass quality = 0% and (ii) the two-phase viscosity is equal to the gas viscosity at the mass quality = 100%. These new definitions can be used to compute the two-phase frictional pressure gradient using the homogeneous modeling approach. These new models are assessed using published experimental data of two-phase frictional pressure gradient in circular pipes, minichannels and microchannels in the form of Fanning friction factor (f(m)) versus Reynolds number (Re-m). The published data include different working fluids such as R-12, R-22, argon (R740), R717, R134a, R410A and propane (R290) at different diameters and different saturation temperatures. Models are assessed on the basis minimizing the root mean square error (e(RMS)). It is shown that these new definitions of two-phase viscosity can be used to analyze the experimental data of two-phase frictional pressure gradient in circular pipes, minichannels and microchannels using simple friction models. (C) 2008 Elsevier Inc. All rights reserved.
机译：利用多孔介质的导热系数和两相流中的粘度之间的类比，提出了两相粘度的新定义。这些新定义满足以下两个条件：（i）两相粘度等于质量质量= 0％时的液体粘度，以及（ii）两相粘度等于质量质量时的气体粘度。 = 100％。这些新定义可用于使用均质建模方法来计算两相摩擦压力梯度。这些新模型是使用已公开的圆形管道，微型通道和微型通道中两相摩擦压力梯度的实验数据进行评估的，其形式为范宁摩擦系数（f（m））对雷诺数（Re-m）。公开的数据包括不同直径和不同饱和温度下的不同工作流体，例如R-12，R-22，氩气（R740），R717，R134a，R410A和丙烷（R290）。在最小化均方根误差（e（RMS））的基础上评估模型。结果表明，这些新的两相粘度定义可以使用简单的摩擦模型来分析圆形管道，微通道和微通道中两相摩擦压力梯度的实验数据。 （C）2008 Elsevier Inc.保留所有权利。

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