Статья

Enhanced thermal conductivity and viscosity of copper nanoparticles in ethylene glycol nanofluid

Jivtesh GargMassachusetts Institute of Technology 1 Department of Mechanical Engineering, , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USABed PoudelBoston College 2 Department of Physics, , Chestnut Hill, Massachusetts 02467, USAMatteo ChiesaMassachusetts Institute of Technology 1 Department of Mechanical Engineering, , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USAJesse B. GordonMassachusetts Institute of Technology 1 Department of Mechanical Engineering, , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USAJ. J.Massachusetts Institute of Technology 1 Department of Mechanical Engineering, , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USAJ. B. WangHuazhong University of Science and Technology 4 School of Environmental Science and Engineering, , People’s Republic of ChinaZhifeng RenBoston College 2 Department of Physics, , Chestnut Hill, Massachusetts 02467, USAYong Tae KangKyung Hee University 5 School of Mechanical and Industrial Engineering, , South KoreaHiroko OhtaniFord Motor Company 3 Materials and Nanotechnology Department, Research and Advanced Engineering, , Dearborn, Michigan 48121, USAJagjit NandaFord Motor Company 3 Materials and Nanotechnology Department, Research and Advanced Engineering, , Dearborn, Michigan 48121, USAGareth H. McKinleyMassachusetts Institute of Technology 1 Department of Mechanical Engineering, , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USAGang ChenMassachusetts Institute of Technology 1 Department of Mechanical Engineering, , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA

2008en

ABI

Аннотация

This study investigates the thermal conductivity and viscosity of copper nanoparticles in ethylene glycol. The nanofluid was prepared by synthesizing copper nanoparticles using a chemical reduction method, with water as the solvent, and then dispersing them in ethylene glycol using a sonicator. Volume loadings of up to 2% were prepared. The measured increase in thermal conductivity was twice the value predicted by the Maxwell effective medium theory. The increase in viscosity was about four times of that predicted by the Einstein law of viscosity. Analytical calculations suggest that this nanofluid would not be beneficial as a coolant in heat exchangers without changing the tube diameter. However, increasing the tube diameter to exploit the increased thermal conductivity of the nanofluid can lead to better thermal performance.

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Идентификаторы

DOI: 10.1063/1.2902483

Цитирования и источники

Цитирований: 2Использованных источников: 0

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