Estimation of heat transfer coefficient of water and ethylene glycol mixture in nanopipe via non-equilibrium coarse-grained molecular dynamics
| Autor: | Sang Kyu Kwak, JinHyeok Cha, Eunhye Shin, Eun Min Go |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
General Chemical Engineering Thermodynamics 02 engineering and technology Heat transfer coefficient 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Coolant Boundary layer chemistry.chemical_compound Molecular dynamics chemistry Heat transfer Newtonian fluid 0210 nano-technology Ethylene glycol |
| Zdroj: | Journal of Industrial and Engineering Chemistry. 77:128-134 |
| ISSN: | 1226-086X |
| DOI: | 10.1016/j.jiec.2019.04.027 |
| Popis: | 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 × 10 8 W/m 2 K, and those of water and EG were 1.24 × 10 8 and 1.87 × 10 8 W/m 2 K, respectively. A relationship between the TBL and the HTC existed along the pipe and that the heat transfer mainly occurred in the TBL. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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