Combined effects of local curvature and elasticity of an isothermal wall for jet impingement cooling under magnetic field effects

作     者：SELİMEFENDİGİL Fatih ÇOĞAN Mehmet ÖZTOP Hakan F. SEL?MEFEND?G?L Fatih;?O?AN Mehmet;?ZTOP Hakan F

作者机构：Department of Mechanical EngineeringCelal Bayar UniversityManisa 45140Turkey Department of Mechanical EngineeringTechnology FacultyFırat UniversityElazığ23119Turkey 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2021年第28卷第11期

页      面：3534-3544页

核心收录：

学科分类：080701[工学-工程热物理] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0812[工学-计算机科学与技术（可授工学、理学学位）] 0702[理学-物理学] 

主　　题：jet impingement nanoparticles elastic wall MHD CFD curved wall 

摘      要：The aim of this study is to examine the effects of local curvature and elastic wall effects of an isothermal hot wall for the purpose of jet impingement cooling *** element method was used with *** important parametric effects such as Re number(between 100 and 700),Ha number(between 0 and 20),elasticity(between 104 and 109),curvature of the surface(elliptic,radius ratio between 1 and 0.25) and nanoparticle volume fraction(between 0 and 0.05) on the cooling performance were investigated *** results showed that the average Nu number enhances for higher Hartmann number,higher values of elastic modulus of partly flexible wall and higher nanoparticle volume *** the magnetic field is imposed at the highest strength,there is an increase of3.85% in the average Nu for the curved elastic wall whereas it is 89.22% for the hot part above it,which is due to the vortex suppression *** inclusion in the base fluid improves the heat transfer rate by about 27.6% in the absence of magnetic field whereas it is 20.5% under the effects of magnetic field at Ha=*** effects become important for higher Re numbers and at Re=700,there is 14.11% variation in the average Nu between the cases with the lowest and highest radius *** elastic wall effects on the heat transfer are reduced with the increased curvature of the bottom wall.