雷诺数对乙二醇中Al2O3体积浓度的影响

Q3 Engineering

International Journal of Vehicle Structures and Systems Pub Date : 2023-10-08 DOI:10.4273/ijvss.15.3.13

Kusammanavar Basavaraj, K. Elangovan, S. Shankar, Anand Kulkarni, S. Satyanarayan

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引用次数: 0

摘要

纳米流体是悬浮在基液中的纳米颗粒，在许多传热应用中用于提高传热速率。雷诺数是表征纳米流体流动以提高传热速率的无量纲数。本研究考察了雷诺数对0.01%体积浓度的氧化铝(Al2O3)纳米颗粒在乙二醇管内流动的影响。本研究以乙二醇为基液。本文采用直径为8mm、长度为400mm的圆柱形铜管，测定了Al2O3/EG纳米流体的热物理特性。考虑纳米流体入口温度为298 K，管壁热流密度为1100 W/m2 K，雷诺数为200 ~ 1200时，计算了传热系数HTC和努塞尔数。结果表明，随着雷诺数的增加，纳米流体在管内流动的HTC和Nusselt数增加。进一步，对所得结果提出了雷诺数与HTC和努塞尔数变化的指数相关性。利用ANSYS Fluent软件对纳米流体在管道中的流动进行了分析。

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Effects of Reynolds Number on the Volume Concentration of Al2O3 in Ethylene Glycol

The nanofluid is suspension of nanoparticles in the base fluid used to enhance the heat transfer rate in many applications of heat transfer. The Reynolds number is the dimensionless number used to characterize the flow of the nanofluid to enhance the heat transfer rate. The current study, the effects of Reynolds number on 0.01% volume concentrations of the aluminium oxide (Al2O3) nanoparticles in the ethylene glycol through the flow in the pipe are investigated. In the study, ethylene glycol is considered as the base fluid. The thermophysical characteristics of the Al2O3/EG nanofluid were determined in the current work using a cylindrical copper pipe with an 8 mm diameter and 400 mm length. The heat transfer coefficient (HTC) and Nusselt number were calculated for the Reynolds number varied from 200 to 1200, considering nanofluid inlet temperature of 298 K and constant heat flux at the wall surface of pipe 1100 W/m2 K. The findings showed that the HTC and Nusselt number of the nanofluid flow in the pipe increased as the Reynolds number increased. Further, an exponential correlation was proposed for variation of the Reynolds number with HTC and Nusselt number for the obtained results. ANSYS Fluent software was used for the analysis of the nanofluid flow though pipe.

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来源期刊

International Journal of Vehicle Structures and Systems Engineering-Mechanical Engineering

CiteScore

0.90

自引率

0.00%

发文量

期刊介绍： The International Journal of Vehicle Structures and Systems (IJVSS) is a quarterly journal and is published by MechAero Foundation for Technical Research and Education Excellence (MAFTREE), based in Chennai, India. MAFTREE is engaged in promoting the advancement of technical research and education in the field of mechanical, aerospace, automotive and its related branches of engineering, science, and technology. IJVSS disseminates high quality original research and review papers, case studies, technical notes and book reviews. All published papers in this journal will have undergone rigorous peer review. IJVSS was founded in 2009. IJVSS is available in Print (ISSN 0975-3060) and Online (ISSN 0975-3540) versions. The prime focus of the IJVSS is given to the subjects of modelling, analysis, design, simulation, optimization and testing of structures and systems of the following: 1. Automotive vehicle including scooter, auto, car, motor sport and racing vehicles, 2. Truck, trailer and heavy vehicles for road transport, 3. Rail, bus, tram, emerging transit and hybrid vehicle, 4. Terrain vehicle, armoured vehicle, construction vehicle and Unmanned Ground Vehicle, 5. Aircraft, launch vehicle, missile, airship, spacecraft, space exploration vehicle, 6. Unmanned Aerial Vehicle, Micro Aerial Vehicle, 7. Marine vehicle, ship and yachts and under water vehicles.