A new approach to sub-grid surface tension for LES of two-phase flows
In two-phase flow, the presence of inter-phasal surface  the interface  causes additional terms to appear in LES formulation. Those terms were ignored in contemporary works, for the lack of model and because the authors expected them to be of negligible influence. However, it has been recently shown by a priori DNS simulations that the negligibility assumption can be challenged. In the present work, a model for one of the sub-grid two-phase specific terms is proposed, using deconvolution of the velocity field and advection of the interface using that field. Using the model, the term can be included into LES. A brief presentation of the model is followed by numerical tests that assess the models performance by comparison with a priori DNS results.
surface tension two-phase flow large eddy simulation clsvof