Contact angle measurements for automotive exterior water management
Contact angle measurements for automotive exterior water management
复制标题
汽车外部水管理的接触角测量
DOI:
10.1007/s00348-021-03219-2
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发表时间:
2021
影响因子:
2.4
通讯作者:
Hodgson G
中科院分区:
文献类型:
--
作者:
Hodgson G
The simulation of fluid flow over solid surfaces is important in many applications, for example, in automotive applications where good visibility and the performance of external sensors are essential. Multiphase CFD simulation methods such as level set or coupled level set–volume of fluid typically require a validated dynamic contact angle model as a function of capillary number to accurately resolve the near wall behaviour. This paper explores an experimental approach to identify a suitable contact angle model for pure and contaminated water on glass and painted surfaces. Applying image processing methods to high-resolution digital images of droplets descending flat plate samples of the required surfaces, the dynamic advancing and receding contact angles and capillary number are determined. Cox–Voinov, de Gennes and Yokoi models are parameterised from the experimental data, and the Yokoi model is shown to be the most suited to these surface/fluid combinations where hysteresis is significant. A multiphase simulation implementing the Yokoi model demonstrates good correlation for the Bond number between simulation and experiment.Graphic abstract
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通讯作者:
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10.4271/2019-01-0640
发表时间:
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期刊:
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影响因子:
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作者:
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