Affiliation:
1. Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
2. School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
Abstract
This work experimentally investigated the effects of different factors, including nanoparticle size and type, volume fraction, and base fluid, on the thermal conductivity enhancement of nanofluids. The experimental results indicate that the thermal conductivity enhancement of nanofluids is proportional to the thermal conductivity of the nanoparticles, with the enhancement being more pronounced for fluids with lower thermal conductivity. Meanwhile, the thermal conductivity of nanofluids decreases with increasing particle size and increases with increasing volume fraction. In addition, elongated particles are superior to spherical ones for thermal conductivity enhancement. This paper also proposes a thermal conductivity model by introducing the effect of nanoparticle size based on the previous classical thermal conductivity model via the method of dimensional analysis. This model analyzes the magnitude of influencing factors on the thermal conductivity of nanofluid and proposes suggestions for an improvement in thermal conductivity enhancement.
Funder
National Natural Science Foundation of China
CMSA-ESA International Cooperation of Space Experiment Project
the Bureau of International Cooperation of the Chinese Academy of Sciences
China Manned Space Engineering Application Program—China Space Station Experiment Project
Science and Technology Innovation 2025 Major Project of Ningbo City
Subject
Electrical and Electronic Engineering,Mechanical Engineering,Control and Systems Engineering
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