Investigate the Impact of Dimple Size and Distribution on the Hydrothermal Performance of Dimpled Heat Exchanger Tubes
作者机构：Mechanical Engineering DepartmentCollege of EngineeringMustansiriyah UniversityBaghdadIraq
出 版 物：《Frontiers in Heat and Mass Transfer》 (热量和质量传递前沿（英文）)
年 卷 期：2024年第22卷第2期
页 面：597-613页
核心收录：
学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0801[工学-力学（可授工学、理学学位）]
基 金：Mustansiriyah University in Baghdad
主 题：Dimpled tube numerical simulation in-line and staggered arrangements overall performance criterion(OPC)
摘 要：In this study,the primary objective was to enhance the hydrothermal performance of a dimpled tube by addressing areas with low heat transfer compared to other *** accomplish this,a comprehensive numerical investigation was conducted using ANSYS Fluent 2022 R1 software,focusing on different diameters of dimples along the pipe’s length and the distribution of dimples in both in-line and staggered *** simulations utilized the finite elementmethod to address turbulent flowwithin the tube by solving partial differential equations,encompassing Re numbers spanning from 3000 to *** study specifically examined single-phase flow conditions,with water utilized as the cooling *** results of the investigation indicated that increasing the Reynolds number resulted in higher average Nusselt numbers,pressure drops,the overall performance criterion,and a reduction in average thermal resistance across all models ***,both proposedmodels demonstrated improved heat transfer when compared to the conventional *** of all the models evaluated,the tube featuring staggered dimples(Model B)demonstrated the most notable improvement in the Nu *** exhibited an enhancement of approximately twice the value compared to the conventional *** mean thermal resistance for the tube with dimples in the staggered arrangement(Model B)is 0.0057 k/W,compared to 0.0118 k/W for the traditional *** maximum overall performance criterion for Model-A-and Model-Bis 1.22 and 1.33,respectively.
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