纳米流体强制对流过程中充填相变材料的三角形弹性壁通气腔内的相变动力学  

Phase change dynamics in a triangular elastic walled vented cavity having phase change material packed bed during nanofluid forced convection

作　　者：SELİMEFENDİGİL Fatih ÖZTOP Hakan F Nidal ABU-HAMDEH 

机构地区：[1]Department of Mechanical Engineering,College of Engineering,King Faisal University,Al Ahsa,Saudi Arabia [2]Department of Mechanical Engineering,Manisa Celal Bayar University,Manisa,Turkey [3]Department of Mechanical Engineering,Technology Faculty,Fırat University,Elazığ,Turkey [4]Department of Mechanical Engineering,Engineering Faculty,King Abdulaziz University,Jeddah,Saudi Arabia [5]KA.CARE Energy Research and Innovation Center,King Abdulaziz University,Jeddah 21589,Saudi Arabia [6]Center of Research Excellence in Renewable Energy and Power Systems,King Abdulaziz University,Jeddah,Saudi Arabia

出　　处：《Journal of Central South University》2023年第11期3630-3640,共11页中南大学学报（英文版）

摘　　要：本文研究了在层流状态下纳米流体强制对流时三角形弹性壁通气腔内的相变过程动力学。采用有限元方法探讨了雷诺数(Re)、柯西数(Ca)和腔口尺寸对流场和相变动力学的影响。研究发现,Re、Ca和腔口尺寸的变化对进气道下流动再循环和相变动力学有一定的影响。当Re从100增加到200时,相变时间(TF)先缩短后延长。在Re=100时,混合纳米流体相变速度快,相变时间降低约26%。当Ca为最大值时,相变时间减少了12.5%。腔口尺寸对相变有负面影响,而腔口尺寸的增大使相变时间增加了19%。In this study,phase change process dynamics in a triangular shaped elastic walled vented cavity is explored during nanofluid forced convection in the laminar flow regime.Impacts of Reynolds number(Re),Cauchy number(Ca)and port size of the cavity on the flow field and phase change dynamics are explored by finite element method.It is observed that the flow recirculation below the inlet port and phase change dynamics are affected by the variation of Re,Ca and port size.The phase transition time(TF)is reduced first when increasing Re from 100 to 200 and then increases.Hybrid nanofluid results in fast phase change while TF is reduced by about 26%at Re=100.Up to 12.5%reduction of TF is achieved at the highest value of Ca.The port size has a negative impact on the phase transition while TF is increased up to 19%with varying the port size.

关 键 词：相变过程 弹性墙 纳米流体 有限元法 

分 类 号：TK11[动力工程及工程热物理—热能工程]