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Different Average Size Evolution of Gaseous Water Cluster in an Expanding Gas Flow
Journal of Cluster Science ( IF 2.8 ) Pub Date : 2020-09-17 , DOI: 10.1007/s10876-020-01887-4
Mengxiao Wang , A. S. Boldarev , Xingjia Li , Yunjiu Cao , Guanglong Chen

Abstract

Formation of pure gaseous water cluster in the supersonic gas flow from a conical nozzle was investigated by simulation. The simulation results show that average size of water cluster indicates a different size evolution along the gas flow, i.e., the average cluster size firstly increases to a maximum size and then decreases slowly, rather than keeps increasing like other gases. By further calculations of the nucleation rate and the growth rate of water cluster, it is found that the decrease of average size results from a high nucleation rate and a low size growth rate in the downstream of gas flow far away from conical nozzle throat.

Graphic Abstract

Formation of pure gaseous water cluster in the supersonic gas flow from a conical nozzle was investigated by simulation. The simulation results show that average size of water cluster indicates a different size evolution along the gas flow, i.e., the average cluster size firstly increases to a maximum size and then decreases slowly, rather than keeps increasing like other gases.



中文翻译:

膨胀气流中气态水团簇的不同平均尺寸演化

摘要

通过模拟研究了超音速气流从锥形喷嘴中形成的纯净气态水团簇。仿真结果表明,水团簇的平均大小指示了沿着气流的不同大小演变,即,平均团簇大小首先增加到最大大小,然后缓慢减小,而不是像其他气体一样不断增加。通过对水团簇的成核速率和生长速率的进一步计算,发现平均尺寸的减小是由于远离锥形喷嘴喉的气流下游的高成核速率和低尺寸生长速率引起的。

图形摘要

通过模拟研究了超音速气流从锥形喷嘴中形成的纯净气态水团簇。仿真结果表明,水团簇的平均大小指示了沿着气流的不同大小演变,即,平均团簇大小首先增加到最大大小,然后缓慢减小,而不是像其他气体一样不断增加。

更新日期:2020-09-18
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