Understanding how the nanoparticles influence flow behavior of nanofluids is important for revealing mechanism of heat transfer enhancement by using nanofluids. The aim of this work was to study the microscopic change in base fluid and micro-motion of nanoparticles due to Brownian motion by molecular dynamics simulation. The present work established shearing flow simulation models considering different shapes of nanoparticles. Velocity distribution and number density distribution of fluid, and angular velocity components and translational velocity components of nanoparticles were statistically analyzed. The results of velocity distribution and number density distribution showed that adding nanoparticles reduces flow boundary layer and causes uneven distribution of mass; and the results for angular velocity components and translational velocity components of nanoparticles showed that nanoparticles rotate fast in the fluid, and vibrate irregularly. The present study suggests that adding nanoparticles causes microscopic change for base fluid including reducing thickness of flow boundary layer and uneven density distribution in fluid. In addition, the micro-motions of nanoparticles including rotation and vibration due to Brownian motion strengthen micro-flow effect and momentum transfer in nanofluids. Furthermore, by comparing motion behaviors of nanoparticles in different shapes the present work reveals that shapes of nanoparticles influence deeply flow behavior of nanofluids.
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ASME 2013 4th International Conference on Micro/Nanoscale Heat and Mass Transfer
December 11–14, 2013
Hong Kong, China
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-5615-4
PROCEEDINGS PAPER
On the Influence of Nanoparticle Shapes for Nanofluids Flow Behaviors by Molecular Dynamics Simulation
Wenzheng Cui,
Wenzheng Cui
Dalian University of Technology, Dalian, China
Harbin Institute of Technology, Weihai, China
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Minli Bai,
Minli Bai
Dalian University of Technology, Dalian, China
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Jizu Lv,
Jizu Lv
Dalian University of Technology, Dalian, China
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Peng Weng,
Peng Weng
Dalian University of Technology, Dalian, China
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Chengzhi Hu,
Chengzhi Hu
Dalian University of Technology, Dalian, China
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Xiaojie Li
Xiaojie Li
Dalian University of Technology, Dalian, China
Search for other works by this author on:
Wenzheng Cui
Dalian University of Technology, Dalian, China
Harbin Institute of Technology, Weihai, China
Minli Bai
Dalian University of Technology, Dalian, China
Jizu Lv
Dalian University of Technology, Dalian, China
Peng Weng
Dalian University of Technology, Dalian, China
Chengzhi Hu
Dalian University of Technology, Dalian, China
Xiaojie Li
Dalian University of Technology, Dalian, China
Paper No:
MNHMT2013-22024, V001T02A004; 7 pages
Published Online:
February 26, 2014
Citation
Cui, W, Bai, M, Lv, J, Weng, P, Hu, C, & Li, X. "On the Influence of Nanoparticle Shapes for Nanofluids Flow Behaviors by Molecular Dynamics Simulation." Proceedings of the ASME 2013 4th International Conference on Micro/Nanoscale Heat and Mass Transfer. ASME 2013 4th International Conference on Micro/Nanoscale Heat and Mass Transfer. Hong Kong, China. December 11–14, 2013. V001T02A004. ASME. https://doi.org/10.1115/MNHMT2013-22024
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