Employing nanofluids is an innovative way to enhance heat transfer in cooling system of internal combustion engine. However, the local flow enhancement due to the adding of nanoparticles, which is one of the key mechanisms behind heat transfer enhancement in nanofluids, still lacks a microscale-level understanding. The aim of this work was to study the microscopic mechanism for local flow enhancement in nanofluids by molecular dynamics (MD) simulation. Local flow characteristics of nanofluids were simulated by MD method and statistically analyzed, and the microscopic mechanism for local flow enhancement was discussed. The MD simulation results revealed that the microscopic mechanism for local flow enhancement in nanofluids is mainly because the irregular movements of nanoparticles, including rotational and translational motions, enhance momentum exchange between fluid molecules and cause disturbance of base fluid. And therefore flow of nanofluids would be more active, which is better for heat transfer. The present work suggests the microscopic mechanism of local flow enhancement in nanofluids, which is the basis of understanding heat transfer enhancement of nanofluids and further application of them in cooling system of internal combustion engine.
- Heat Transfer Division
Molecular Dynamics Simulation on Motion Behaviors of Nanofluids With Cylindrical Nanoparticles in Nanochannel
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Bai, M, Cui, W, Lv, J, Li, G, & Li, X. "Molecular Dynamics Simulation on Motion Behaviors of Nanofluids With Cylindrical Nanoparticles in Nanochannel." Proceedings of the ASME 2012 Heat Transfer Summer Conference collocated with the ASME 2012 Fluids Engineering Division Summer Meeting and the ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels. Volume 1: Heat Transfer in Energy Systems; Theory and Fundamental Research; Aerospace Heat Transfer; Gas Turbine Heat Transfer; Transport Phenomena in Materials Processing and Manufacturing; Heat and Mass Transfer in Biotechnology; Environmental Heat Transfer; Visualization of Heat Transfer; Education and Future Directions in Heat Transfer. Rio Grande, Puerto Rico, USA. July 8–12, 2012. pp. 625-633. ASME. https://doi.org/10.1115/HT2012-58505
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