Analysis of the oscillatory behavior of van der Waals fluid droplets under microgravity conditions using the Smoothed Particle Hydrodynamics method

In the present work, the Smoothed Particle Hydrodynamics method (SPH) is employed in the modeling of a two-dimensional drop formation problem, without an external atmosphere, using a van der Waals fluid. In addition, influences of Reynolds number, initial aspect ratio and Péclet number on drops oscillatory behavior are studied in open space conditions with zero gravity assumption. In view of the most recent researches in drops formation field using the SPH method, a hyperbolic kernel is applied to all simulations in order to ensure uniform drops liquid formation, i.e., without particle agglomeration. Through the usage of this smoothing function the tensile instability is reduced, avoiding unnecessary numerical treatments