Journal ArticleDOI
Thermal conductivity of Fe nanofluids depending on the cluster size of nanoparticles
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TLDR
In this article, the effect of the clustering of nanoparticles on the thermal conductivity of nanofluids was investigated and it was found from the variations of the nan-cluster size and thermal conductivities that the reduction of the thermalconductivity was directly related to the agglomeration of nanarticles.Abstract:
Nanofluids have been attractive for the last few years with the enormous potential to improve the efficiency of heat transfer fluids. This work focuses on the effect of the clustering of nanoparticles on the thermal conductivity of nanofluids. Large enhancement of the thermal conductivity is observed in Fe nanofluids sonicated with high powered pulses. The average size of the nanoclusters and thermal conductivity of sonicated nanofluids are measured as time passes after the sonication stopped. It is found from the variations of the nanocluster size and thermal conductivity that the reduction of the thermal conductivity of nanofluids is directly related to the agglomeration of nanoparticles. The thermal conductivity of Fe nanofluids increases nonlinearly as the volume fraction of nanoparticles increases. The nonlinearity is attributed to the rapid clustering of nanoparticles in condensed nanofluids. The thermal conductivities of Fe nanofluids with the three lowest concentrations are fitted to a linear function. The Fe nanofluids show a more rapid increase of the thermal conductivity than Cu nanofluids as the volume fraction of the nanoparticles increases.read more
Citations
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Heat transfer characteristics of nanofluids: a review
Xiang-Qi Wang,Arun S. Mujumdar +1 more
TL;DR: A review on fluid flow and heat transfer characteristics of nanofluids in forced and free convection flows is presented in this article, where the authors identify opportunities for future research.
Journal ArticleDOI
Review and Comparison of Nanofluid Thermal Conductivity and Heat Transfer Enhancements
TL;DR: In this article, the authors provide a detailed literature review and an assessment of results of the research and development work forming the current status of nanofluid technology for heat transfer applications.
Journal ArticleDOI
A review of nanofluid stability properties and characterization in stationary conditions
TL;DR: In this article, the stability of nanofluids is discussed as it has a major role in heat transfer enhancement for further possible applications, and general stabilization methods as well as various types of instruments for stability inspection.
Journal ArticleDOI
A benchmark study on the thermal conductivity of nanofluids
Jacopo Buongiorno,David C. Venerus,Naveen Prabhat,Thomas J. McKrell,Jessica Townsend,Rebecca Christianson,Yuriy V. Tolmachev,Pawel Keblinski,Lin-Wen Hu,Jorge L. Alvarado,In Cheol Bang,In Cheol Bang,Sandra Whaley Bishnoi,Marco Bonetti,Frank Botz,Anselmo Cecere,Yun Chang,Gang Chen,Haisheng Chen,Sung Jae Chung,Minking K. Chyu,Sarit K. Das,Roberto Di Paola,Yulong Ding,Frank Dubois,Grzegorz Dzido,Jacob Eapen,Werner Escher,Werner Escher,Denis Funfschilling,Quentin Galand,Jinwei Gao,Patricia E. Gharagozloo,Kenneth E. Goodson,Jorge Gustavo Gutierrez,Haiping Hong,Mark Horton,Kyo Sik Hwang,Carlo Saverio Iorio,Seok Pil Jang,Andrzej B. Jarzębski,Yiran Jiang,Liwen Jin,Stephan Kabelac,Aravind Kamath,Mark A. Kedzierski,Lim Geok Kieng,Chongyoup Kim,Ji Hyun Kim,Seokwon Kim,Seung-Hyun Lee,Kai Choong Leong,Indranil Manna,Bruno Michel,Rui Ni,Hrishikesh E. Patel,John Philip,Dimos Poulikakos,Cécile Reynaud,Raffaele Savino,Pawan Singh,Pengxiang Song,Thirumalachari Sundararajan,Elena V. Timofeeva,Todd Tritcak,Aleksandr N. Turanov,Stefan Van Vaerenbergh,Dongsheng Wen,Sanjeeva Witharana,Chun Yang,Wei Hsun Yeh,Xiao Zheng Zhao,Sheng-Qi Zhou +72 more
TL;DR: The International Nanofluid Property Benchmark Exercise (INPBE) as mentioned in this paper was held in 1998, where the thermal conductivity of identical samples of colloidally stable dispersions of nanoparticles or "nanofluids" was measured by over 30 organizations worldwide, using a variety of experimental approaches, including the transient hot wire method, steady state methods, and optical methods.
Journal Article
A Benchmark Study on the Thermal Conductivity of Nanofluids
Jacopo Buongiomo,David C. Venerus,Naveen Prabhat,Thomas J. McKrell,Jessica Townsend,Rebecca Christianson,Yuriv Tolmachev,Pawel Keblinski,Lin-Wen Hu,Jorge L. Alvarado,In Cheol Bang,Sandra Whaley Bishnoi,Marco Bonetti,Anselmo Cecere,Yun Chang,Gang Chen,Haisheng Chen,Sung Jae Chung,Minking K. Chyu,Sarit K. Das,Roberto Di Paola,Yulong Ding,Frank Dubois,Grzegorz Dzido,Jacob Eapen,Denis Funfschilling,Quentin Galand,Jinwei Gao,Patricia E. Gharagozloo,Kenneth E. Goodson,Jorge Gustavo Gutierrez,Haiping Hong,Mark Horton,Kyo Sik Hwang,Carlo Saverio Iorio,Seok Pil Jang,Andrzej B. Jarzębski,Yiran Jiang,Stephan Kabelac,Liwen Jin,Aravind Kamath,Chongyoup Kim,Ji Hyun Kim,Seokwon Kim,Seunghyun Lee,Kai Choong Leong,Indranil Manna,Rui Ni,Hrishikesh E. Patel,Cecil Reynaud,Raffaele Savino,Pawan Singh,Pengxiang Song,Thirumalachari Sundararajan,Alekzandr N Turanov,Stefan Van Vaerenbergh,Dongsheng Wen,Sanjeeva Witharana,Chun Yang,Wei-Hsun Yeh,Xiao-Zheng Zhao,Sheng-Qi Zhou +61 more
TL;DR: The International Nanofluid Property Benchmark Exercise (INPBE) as discussed by the authors was held in 1998, where the thermal conductivity of identical samples of colloidally stable dispersions of nanoparticles or "nanofluids" was measured by over 30 organizations worldwide, using a variety of experimental approaches, including the transient hot wire method, steady state methods, and optical methods.
References
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Journal ArticleDOI
Anomalously increased effective thermal conductivities of ethylene glycol-based nanofluids containing copper nanoparticles
TL;DR: In this paper, it was shown that a "nanofluid" consisting of copper nanometer-sized particles dispersed in ethylene glycol has a much higher effective thermal conductivity than either pure or pure glycol or even polyethylene glycol containing the same volume fraction of dispersed oxide nanoparticles.
Journal ArticleDOI
Measuring Thermal Conductivity of Fluids Containing Oxide Nanoparticles
TL;DR: In this paper, a transient hot-wire method was used to measure the thermal conductivity of a small amount of nanoparticles and the experimental results showed that these nanoparticles have substantially higher thermal conductivities than the same liquids without nanoparticles.
Journal ArticleDOI
Mechanisms of heat flow in suspensions of nano-sized particles (nanofluids)
TL;DR: In this paper, the authors explore four possible explanations for the anomalous thermal conductivity of nanofluids: Brownian motion of the particles, molecular-level layering of the liquid at the liquid/particle interface, the nature of heat transport in the nanoparticles, and the effects of nanoparticle clustering.
Journal ArticleDOI
Study of the enhanced thermal conductivity of Fe nanofluids
TL;DR: In this article, the authors show that the suspension of highly thermally conductive materials is not always effective to improve thermal transport property of nanofluids, and they also find that suspension of high-powered pulses is also not always beneficial.