Towards Direct Numerical Simulation of ternary systems in contact with a wall using PLIC-based contact line modeling

Drop wall interactions involving not only one liquid but another immiscible liquid phase offer great potential in advanced applications such as cell printing or oil remediation. Being able to simulate such processes helps in understanding and designing them. We therefore develop a simulation framework to simulate a ternary system in contact with a wall. Starting from the framework of Potyka and Schulte [4], our in-house multiphase flow solver Free Surface 3D [2] is extended to accurately simulate the associated contact line dynamics at the wall. The contact angle boundary condition proposed by Sussman [6] is extended for the second liquid phase and applies a local averaged contact angle to distinguish between the contact lines. A short introduction to the theory on compound sessile drops is then followed by several static tests of the code.