Hodgson2021_Article_ContactAngleMeasurementsForAut.pdf (1.91 MB)

Contact angle measurements for automotive exterior water management

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journal contribution
posted on 07.05.2021, 13:46 by Graham HodgsonGraham Hodgson, Martin Passmore, Maciej Skarysz, Andrew GarmoryAndrew Garmory, Franck Paolillo
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.

Funding

Theme 2: Multi-Physics and Multi-Functional Simulation Methods.

Engineering and Physical Sciences Research Council

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A MIDLANDS CENTRE OF EXCELLENCE FOR HIGH PERFORMANCE COMPUTING (HPC) SERVING REGIONAL INDUSTRY AND ACADEMIA - 'HPC MIDLANDS'

Engineering and Physical Sciences Research Council

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History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Aeronautical and Automotive Engineering

Published in

Experiments in Fluids

Volume

62

Issue

5

Publisher

Springer

Version

VoR (Version of Record)

Rights holder

© The Authors

Publisher statement

This is an Open Access Article. It is published by Springer under the Creative Commons Attribution 4.0 International Licence (CC BY 4.0). Full details of this licence are available at: https://creativecommons.org/licenses/by/4.0/

Acceptance date

24/04/2021

Publication date

2021-05-06

Copyright date

2021

ISSN

0723-4864

eISSN

1432-1114

Language

en

Depositor

Dr Graham Hodgson. Deposit date: 7 May 2021

Article number

119

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