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Model for predicting the critical size of aggregates in nanofluids

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Abstract

Stable suspension of the nanoparticles in the base fluids is inevitable to have the nanofluids be operated properly. Here we report the theoretical model to find the critical size of aggregates in nanofluids for the first time. The concept of relaxation time τ r is adopted, which reflects the probability of encountering the particles. The hydrodynamic diameter of the aggregates in nanofluids must be kept below the critical size to be stably suspended, which is in good agreement with the experimental results.

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Authors and Affiliations

  1. Maritime Safety Research Division, MOERI, Korea Institute of Ocean Science and Technology, Daejeon, 305-343, Korea

    Jung-Yeul Jung

  2. Department of Mechanical Engineering, Kyung Hee University, Yongin, Gyeonggi, 446-701, Korea

    Jung-Yeul Jung, Junemo Koo & Yong Tae Kang

Authors
  1. Jung-Yeul Jung
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  2. Junemo Koo
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  3. Yong Tae Kang
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Corresponding author

Correspondence to Yong Tae Kang.

Additional information

Recommended by Editor Haecheon Choi

Jung-Yeul Jung received his BS, MS, and Ph.D degree in Mechanical Engineering from Chung-Ang University in 2001, 2003 and 2007, respectively. He is a senior researcher in Korea Institute of Ocean Science and Technology (KIOST). His research interests are carbon capture and storage (CCS), heat & mass transfer, nanofluids, biosensors and heat exchangers.

Junemo Koo completed his Ph.D degree in Department of Mechanical and Aerospace Engineering, North Carolina State University, NC, USA. He is currently associate professor in Department of Mechanical Engineering, Kyung Hee University. His research area covers heat and mass transfer issues in nanofluids, battery system, building energy, and food engineering.

Yong Tae Kang received his BS, MS and Ph.D. degrees in Mechanical Engineering from Seoul National University in 1987 and 1989, and The Ohio State University in 1994, respectively. Currently, he is a Professor at the Department of Mechanical Engineering, Kyung Hee University, Yongin, Korea. His research interests are CO2 absorption & regeneration, heat & mass transfer, nanofluids, heat pump and air conditioning and refrigeration.

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Jung, JY., Koo, J. & Kang, Y.T. Model for predicting the critical size of aggregates in nanofluids. J Mech Sci Technol 27, 1165–1169 (2013). https://doi.org/10.1007/s12206-013-0224-6

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  • DOI: https://doi.org/10.1007/s12206-013-0224-6

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