Estimation of heat transfer coefficient of water and ethylene glycol mixture in nanopipe via non-equilibrium coarse-grained molecular dynamics

[Display omitted] Using coarse-grained molecular dynamics, we estimated the heat transfer coefficient (HTC) of coolant, a mixture (50:50 wt%) of water and ethylene glycol (EG), in a Fe nanopipe. In the Newtonian flow regime, the pipe was heated at 325 K. The HTC increased rapidly along the nanopipe...

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Bibliographic Details
Published in:Journal of industrial and engineering chemistry (Seoul, Korea) 2019, 77(0), , pp.128-134
Main Authors: Go, Eun Min, Shin, Eunhye, Cha, JinHyeok, Kwak, Sang Kyu
Format: Article
Language:English
Subjects:
CGMD simulation
Heat transfer coefficient
Nanopipe flow
Thermal conductivity
화학공학
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Summary:[Display omitted] Using coarse-grained molecular dynamics, we estimated the heat transfer coefficient (HTC) of coolant, a mixture (50:50 wt%) of water and ethylene glycol (EG), in a Fe nanopipe. In the Newtonian flow regime, the pipe was heated at 325 K. The HTC increased rapidly along the nanopipe at the thermal boundary layer (TBL). The HTC was estimated to be 3.08 × 108 W/m2 K, and those of water and EG were 1.24 × 108 and 1.87 × 108 W/m2 K, respectively. A relationship between the TBL and the HTC existed along the pipe and that the heat transfer mainly occurred in the TBL.
ISSN:1226-086X
1876-794X
DOI:10.1016/j.jiec.2019.04.027