首页> 外文期刊>International Journal of Heat and Mass Transfer >HEAT TRANSFER IN GRAVITY-DRIVEN FILM FLOW OF POWER-LAW FLUIDS
【24h】

HEAT TRANSFER IN GRAVITY-DRIVEN FILM FLOW OF POWER-LAW FLUIDS

机译:重力流动力膜流中的传热

获取原文
获取原文并翻译 | 示例
           

摘要

A mathematical model for the flow and heat transfer in an accelerating liquid film of non-Newtonian power-law fluid is presented. The thermal boundary layer equation permits exact similarity solutions only in the particular case when the power-law index n is equal to unity, i.e. for Newtonian films. To this end, the heat transfer problem is solved by means of a local nonsimilarity approach with n and local Prandtl number Pr being the only parameters. A critical Prandtl number Pr is introduced, which is a monotonically increasing function of n. The nonsimilar heat transfer problem ins integrated numerically for several parameter combinations in the ranges 0.2≤n≤2.0 and 0.001≤Pr_x≤1000 and the calculations for n=1 compared favourably with earlier results for Newtonian liquid films.
机译:提出了一种非牛顿幂律流体在加速液膜中流动和传热的数学模型。热边界层方程仅在幂律指数n等于1的特定情况下(即对于牛顿膜)才允许精确的相似性解。为此,通过局部非相似性方法解决了传热问题,其中n和局部Prandtl数Pr是唯一的参数。引入了一个临界Prandtl数Pr,它是n的单调递增函数。非相似的传热问题在0.2≤n≤2.0和0.001≤Pr_x≤1000范围内的几个参数组合中进行了数值积分,并且n = 1的计算结果与牛顿液膜的早期结果相比具有优势。

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