Investigation of thermo-rheological properties of Fe3O4/Ethylene glycol nanofluid in a square cavity

被引:0
作者
Kamran, Mohammad [1 ]
Qayoum, Adnan [1 ]
机构
[1] Natl Inst Technol Srinagar, Dept Mech Engn, Hazratbal 190006, Srinagar J&K, India
来源
JOURNAL OF THERMAL ENGINEERING | 2023年 / 10卷 / 01期
关键词
Magnetic Nanofluid; Heat Transfer Enhancement; Thermal Conductivity; Rheology; Square Cavity; Natural Convection; Numerical Simulation; THERMAL-CONDUCTIVITY ENHANCEMENT; RHEOLOGICAL BEHAVIOR; ETHYLENE-GLYCOL; NATURAL-CONVECTION; HYBRID NANOFLUID; VISCOSITY; FLOW; TEMPERATURE; SUSPENSIONS;
D O I
暂无
中图分类号
O414.1 [热力学];
学科分类号
摘要
Many fluids used in heat transfer and transport phenomena restrict the effectiveness of heat exchange equipment on account of their low thermal conductivity. Using nanofluids, the effectiveness of heat exchange equipment is enhanced by many folds. The use of magnetic nanofluids for heat transfer generates a prospect of regulating flow and controlling the thermal and transport properties particularly the thermal conductivity and viscosity using an externally applied magnetic field. The present study involves synthesis of oleic acid-coated magnetic nanofluids at varying concentrations of 0 to 0.643% by volume, measurement of thermal conductivity, rheological properties and corresponding numerical simulation of Nanofluid in a heated square cavity. The thermal conductivity measurement have been carried out by transient hot-wire method using KD2-pro at varying concentrations of solid phase. The results show a significant increase in thermal conductivity with increase in particle concentration. Rheological measurements show variation in viscosity with shear rate, temperature and concentration. Moreover, it has been found that at low particle loading magnetic nanofluids exhibited Newtonian behavior unlike non-Newtonian behavior at increased concentration. Numerical simulation of the magnetic nanofluid in the heated square cavity demonstrates the immense potential of augmentation of heat transfer coefficient using such fluids.
引用
收藏
页码:1324 / 1338
页数:15
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