FLOW AND HEAT TRANSFER CHARACTERISTICS OF NANOFLUIDS IN SUDDEN EXPANSION STRUCTURE BASED ON SLA METHOD
作者: Haochun Zhang Zhiyuan Feng Xiuting Liu Dezhuang Yin
刊名: Thermal Science, 2019, Vol.23 (3A/2019), pp.1449-1455
来源数据库: Society for Thermal Engineers of Serbia
DOI: https://doi.org/10.2298/TSCI180609210Z
关键词: NanofluidsSudden expansionEntropy generationSecond law analysisNusselt number
原始语种摘要: The current work aims at a fundamental understanding of the concept of head loss coefficient, K, of nanofluids flowing in sudden expansionpipe. While so far several articles have applied this concept to the laminar flow regime of water, it is extended here to the mechanics of nanofluids. To describe the flow dissipation, a thermodynamic model is built based on the Second law analysis approach to calculate the overall entropy generation with the assistance of appropriate single-phase models used to get viscosity values of nanofluids. Then, specific values of K can be determined by the integration of entropy generation field. In addition, considering the thermodynamic irreversibility caused by temperature gradients due to heat transfer processes, a new concept of thermodynamic loss...
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关键词翻译
关键词翻译
  • laminar 层聊
  • generation 世代
  • calculate 计算
  • fundamental 基本的
  • concentration 浓度
  • temperature 温度
  • integration 集成
  • coefficient 系数
  • entropy 平均信息量
  • transfer 转换