By: Halim Kusumaatmaja
From: U. Durham, UK
At: Online - Zoom (https://videoconf-colibri.zoom.us/j/85221054218)
I will present a free energy lattice Boltzmann approach to simulate multicomponent fluid flows. Focusing on ternary fluid systems, I will discuss models where the density is the same for all fluids , and where high density ratios between the liquid and gas components can be achieved . I will then discuss several applications. First, I will discuss the dynamics of drops moving across liquid infused surfaces [3,4]. These are liquid repellent surfaces made by infusing a lubricant into porous or rough solid surfaces. Second, I will present collision dynamics between two immiscible drops . We are able to capture bouncing, adhesive and insertive regimes, in agreement with experimental observations. Third, I will show our numerical study on generating emulsion droplets using a microfluidic channel . I will demonstrate the rich morphologies that can be achieved by varying the fluid surface tensions and flow rates.References: C. Semprebon et al., Physical Review E 93, 033305 (2016). M. Wörhwag et al., Physical Review Letters 120, 234501 (2018). M. S. Sadullah et al., Langmuir 34, 8112 (2018). M. S. Sadullah et al., Communications Physics 3, 166 (2020) N. Wang et al., Journal of Fluid Mechanics 895, A22 (2020).