首页> 外文期刊>International Journal of Heat and Mass Transfer >Proper orthogonal decomposition of thermally-induced flow structure in an enclosure with alternately active localized heat sources
【24h】

Proper orthogonal decomposition of thermally-induced flow structure in an enclosure with alternately active localized heat sources

机译:具有交替活动局部热源的封闭空间中热诱导流动结构的正确正交分解

获取原文
获取原文并翻译 | 示例
           

摘要

The paper presents the structure of buoyancy-driven flow occurring in an enclosure with two alternately active discrete heat sources. For the analysis of the mixing of the fluid layer and its effect on heat transfer process, the flow information has been presented both in time and spectral domain. The inherent dynamics is also studied using the proper orthogonal decomposition (POD). POD technique is used here to assess the energy content in the different modes and the related coherent structures of flow considering different Rayleigh numbers (Ra =10~3-10~6), switching frequencies (Z~(-1) with Z = 0.1-0.8) and air as working fluid of Prandtl number (Pr) of 0.71. The results reveal nonlinear characteristics of hydrodynamics and heat transfer at higher Ra for low frequency. Here, POD helps understanding the flow dynamics from information about the coherent structures of different energy modes.
机译:本文介绍了在具有两个交替活动的离散热源的机壳中发生的浮力驱动流的结构。为了分析流体层的混合及其对传热过程的影响,在时域和谱域中都提供了流动信息。还使用适当的正交分解(POD)研究了固有动力学。这里使用POD技术评估考虑不同瑞利数(Ra = 10〜3-10〜6),开关频率(Z〜(-1)和Z = 0.1时)在不同模式下的能量含量以及相关的相干流结构-0.8)和空气作为Prandtl数(Pr)为0.71的工作流体。结果表明,在低频情况下,在较高的Ra下,流体力学和传热具有非线性特征。在此,POD有助于从有关不同能量模式的相干结构的信息中了解流动动力学。

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