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| LBM analysis of the effects of gas velocity on the flow pattern of liquid film on the pre-filming surface |
| Received:April 23, 2020 Revised:August 16, 2020 |
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| DOI：10.7511/jslx20200423001 |
| KeyWord:liquid film flow pattern lattice boltzmann model gas velocity gas-liquid interface |
| Author | Institution |
| 于蔚然 |
大连理工大学 海洋能源利用与节能教育部重点实验室, 大连 |
| 周训 |
大连理工大学 海洋能源利用与节能教育部重点实验室, 大连 |
| 李维仲 |
大连理工大学 海洋能源利用与节能教育部重点实验室, 大连 |
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| Abstract: |
| In order to investigate the shearing effects of airflow of aviation fuel on the flow pattern on the pre-filming surface in the airblast atomizers,this paper firstly modifies the phase-field-based lattice Boltzmann model for two-phase flows in the literature,then verifies its accuracy and reliability through a benchmark case.Afterward,the model is used to simulate the flow of liquid film on the pre-filming surface driven by co-current airflow,and the influence of airflow on the flow pattern of liquid film under different air velocities has been analyzed.Numerical results indicate that the present model can accurately track the morphological changes of the gas-liquid interface with a large density ratio.The velocity difference between gas and liquid induces the Kelvin-Helmholtz instability at the interface.Therefore,when the gas velocity increases,the shearing effects of gas enhances arousing higher amplitude surface-waves.Besides,the spreading process of liquid film on the pre-filming surface is accelerated.The volatility of free surface is enhanced as well. |
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