Natural convection heat transfer enhancement of different nanofluids by adding dimple fins on a vertical channel wall

作     者：Milad Gholami Mohammad Reza Nazari Mohammad Hossien Talebi Farzad Pourfattah Omid Ali Akbari Davood Toghraie Milad Gholami;Mohammad Reza Nazari;Mohammad Hossien Talebi;Farzad Pourfattah;Omid Ali Akbari;Davood Toghraie

作者机构：Department of Mechanical EngineeringYazd UniversityYazdIran School of Mechanical EngineeringScience&Arts UniversityYazdIran Mechanical Engineering Department University of KashanKashanIran Young Researchers and Elite ClubKhomeinishahr BranchIslamic Azad UniversityKhomeinishahrIran Department of Mechanical EngineeringKhomeinishahr BranchIslamic Azad UniversityKhomeinishahrIran 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2020年第28卷第3期

页      面：643-659页

核心收录：

学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081704[工学-应用化学] 0817[工学-化学工程与技术] 08[工学] 081701[工学-化学工程] 0703[理学-化学] 

主　　题：Natural heat transfer Dimpled fins Rayleigh number Nanofluid 

摘      要：In this numerical study,natural flow and heat transfer of nanofluids with Al2O3,TiO2,Cu and CNT nanoparticles in a vertical channel with dimpled fins at Rayleigh number(Ra)of Ra=3.25×107 to Ra=1×108 are investigated by using the finite volume *** obtained results revealed that,using CNT in volume fractions of 2%and 4%leads to significant heat transfer and atφ=6%,using TiO2 nanoparticles has a great effect on Nu number ***,using solid nanoparticles in base fluid causes more uniform heat transfer distribution,especially in areas close to heated surface and by adding more volume fraction in base fluid,temperature level *** general,according to temperature contours,reduction of wall temperature depends on the increase of Ra and volume fraction and the type of solid nanoparticles.