Ke Zhao, Yang-Zi She, Yan-Long Jiang, Jing Qin, Zhen-Hao Zhang. Numerical study on phase change behavior of liquid nitrogen droplets impinging on solid surface [J]. Acta Physica Sinica, 2019, 68(24): 244401-1
- Acta Physica Sinica
- Vol. 68, Issue 24, 244401-1 (2019)
Fig. 1. Coupled Level Set-VOF phase interface tracking method calculation flow chart.复合Level Set-VOF相界面追踪方法计算流程图
Fig. 2. Wall adhesion diagram.壁面黏附
Fig. 3. Model of droplet impact on wall at initial time.初始时刻液滴撞击壁面几何模型及边界条件
Fig. 4. Verification of grid independence.网格无关性验证
Fig. 5. Comparison of experimental and simulated results: (a) Spreading factor changes with time; (b) comparison of droplet morphology evolution.实验结果与模拟结果对比 (a)铺展因子随时间变化; (b)液滴形貌对比
Fig. 6. Morphology evolution of droplets impinging on different wetted walls with initial velocity (D 0 = 0.5 mm): (a) 0.1 m/s; (b) 1.6 m/s.
初始速度为(a) 0.1 m/s和(b) 1.6 m/s的液滴撞击不同润湿壁面的形貌演变(D 0 = 0.5 mm)
Fig. 7. Heat flux density distribution of droplets impinging on different wetted walls with initial velocity: (a) 0.1 m/s; (b) 1.6 m/s.初始速度为(a) 0.1 m/s和(b) 1.6 m/s的液滴撞击不同润湿壁面的热流分布
Fig. 8. Temperature distribution at different times (θ = 30°, U 0 = 0.1 m/s, T w = 300 K).
不同时刻的温度分布(θ = 30°, U 0 = 0.1 m/s, T w = 300 K)
Fig. 9. Pressure distribution at 0.05 ms after droplets impact wall with different velocities.不同速度的液滴撞壁后在0.05 ms时刻的压力分布
Fig. 10. Dimensional film thickness with dimensionless time curve of droplets impinging on different wetted walls with initial velocity: (a) 0.1 m/s; (b) 1.6 m/s.初始速度为(a) 0.1 m/s和(b) 1.6 m/s液滴撞击不同润湿壁面的无量纲气膜厚度随无量纲时间的变化
Fig. 11. Heat flux distribution on different temperature walls at (a) 0.05 ms and (b) 1.6 ms.(a) 0.05 ms和(b) 1.6 ms时不同温度壁面上的热流密度分布
Fig. 12. Droplets temperature distribution on different temperature wall at (a) 0.05 ms and (b) 1.6 ms.(a) 0.05 ms和(b) 1.6 ms不同温度壁面上的液滴温度分布
Fig. 13. Curves of dimensionless film thickness with dimensionless time on different wall temperatures.不同壁面温度上无量纲气膜厚度随无量纲时间的变化
Fig. 14. Curves of film thickness with time on different wall temperatures: (a) Fitting results; (b) Breitenbach et al.[33] analysis results.
不同壁面温度上气膜厚度随时间的变化 (a)拟合结果; (b) Breitenbach等[33]的分析结果
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Table 1.
Related parameters.
相关参数
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