Simulation of pool boiling of nanofluids by using Eulerian multiphase model
| Autor: | Omid Mahian, Mohammed Saad Kamel, Ferenc Lezsovits, Mohamed Sobhi Alagha |
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| Rok vydání: | 2019 |
| Předmět: |
Work (thermodynamics)
Materials science 020209 energy Bubble Nucleation 02 engineering and technology Mechanics 021001 nanoscience & nanotechnology Condensed Matter Physics Physics::Fluid Dynamics Nanofluid Heat flux Boiling 0202 electrical engineering electronic engineering information engineering Surface roughness Wetting Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | Journal of Thermal Analysis and Calorimetry. 142:493-505 |
| ISSN: | 1588-2926 1388-6150 |
| Popis: | In the present work, a new simulation of nanofluid/vapor two-phase flow inside the 2-D rectangular boiling chamber was numerically investigated. The Eulerian–Eulerian approach used to predict the boiling curve and the interaction between two phases. The surface modification during pool boiling of silica nanofluid represented by surface roughness and wettability is put into the account in this simulation. New closure correlations regarding the nucleation sites density and bubble departure diameter during boiling of silica nanofluid were inserted to extend the boiling model in this work. Besides, the bubble waiting time coefficient which involved in quenching heat flux under heat flux partitioning HFP model was corrected to improve the results of this study. The numerical results validated with experimental works in the literature, and they revealed good agreements for both pure water and nanofluids. The results found that when improving the heat flux partitioning model HFP by considering the surface modification of nucleate pool boiling parameters, it will give more mechanistic sights compared to the classical model, which is used for predicting of boiling heat transfer of pure liquid. |
| Databáze: | OpenAIRE |
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