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A surface tension and wetting model for the δ+-SPH scheme

: Bierwisch, C.

Quinlan, N.J. ; National University of Ireland, Galway:
SPHERIC 2018, 13th SPHERIC International Workshop. Proceedings : Galway, Ireland, 26-28 June 2018
Galway: National University of Ireland, 2018
ISBN: 9781908358592
ISBN: 1908358599
SPHERIC International Workshop <13, 2018, Galway>
Fraunhofer IWM ()
surface tension; thermocapillarity; wetting; marangoni flow; numerical simulation

An extension to the delta-plus-SPH scheme is presented which allows to model surface tension including temperature-dependency and wetting. The new model makes use of the surface identification mechanism presented in [Marrone 2010] and refined in [Sun 2017] and combines this procedure with the surface tension scheme described in [Breinlinger 2013]. The effect of Marangoni convection is included by calculating the temperature gradient on the surface according to [Tong 2014]. The model requires only a single fluid phase and is therefore computationally more efficient than surface tension schemes which need an explicit fluid-fluid or fluid-gas interface. The model is parametrized by three physical parameters, namely the surface tension, the change of surface tension with temperature and the contact angle on a substrate.