A Ghost Fluid Method based Sharp Interface Level Set Method for Evaporating Droplet

Level set method coupled with a Ghost Fluid Method (GFM) is presented to capture the liquid-gas interface of an evaporating liquid droplet. An in-house code based on finite volume method is developed for capturing jump boundary conditions using GFM. In GFM, the boundary conditions are applied in the form of discontinuity in the solution variable, in the gradient of the variable and in the properties of two fluids across the interface. The in-house code is validated for a mathematical and a physical test cases. The droplet evaporation occurs due to vapor diffusion and velocity potential equation is used with jump in the velocity across the interface. Simulations are also performed for moving evaporating droplet case, where GFM based sharp interface method is coupled with flow solver based on diffuse interface level set method. (C) 2015 Published by Elsevier B.V.