Dynamic contact angle model

[Adèle Poubeau]

Dear all,

I would like to simulate the transient behavior of a falling film on a flat plate. Has anyone ever implemented a dynamic contact angle model in Basilisk (like Cox, Kistler)? 

I searched in the sandboxes and found nothing, but I just wanted to make sure...

thank you in advance for your help!

Adele

[Stephane Zaleski]

Dear Adèle

Several did, but it is a research topic, not a software engineering question. You should contact one of the groups involved with a proposal for collaboration, or hope they will respond to your message, or wait until they publish their work*. If you do not know who these groups are, I am not sure how I can help you, but if you tell us more about your circumstances it will be easier to discern.

Hope it helps

Stéphane

PS full disclosure: I believe that the use of these models in most applications is not a good idea, they do not represent correctly the physics, a bit like k-epsilon models not describing correctly turbulence.

*there is in fact a quasi publication: https://zenodo.org/records/10142048

A consistent treatment of dynamic contact angles in the sharp-interface framework with the generalized Navier boundary condition Creators
• Fullana, Tomas1, 2
• Kulkarni, Yash2
• Fricke, Mathis3
• Popinet, Stéphane2
• Afkhami, Shahriar4
• Bothe, Dieter3
• Zaleski, Stéphane2

this does not implement a DCA model but could easily be tweaked to do so.

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[Adèle Poubeau]

Dear Stéphane,

 

Thanks a lot for your answer. My question was certainly not precise enough. My objective is to reproduce in Basilisk some simulations of rivulet cascade from falling liquid films, as performed in Lavalle et al (2020) in VoF with the code JADIM. Lavalle used the Cox-Voinov model, giving a dynamic contact angle depending on the static contact angle, the grid cell size and the contact line velocity. Before coding this model myself in Basilisk, I was just wondering if I had missed it looking in the sandboxes (I’m a beginner in the Basilisk world!).

 I am aware that these models have their limitations and are the subject of active research to improve them. Thank you for the link to this new paper, I will read it carefully.

Adèle