Problems involving fluids with moving interfaces are of central concern in a microgravity nvironment. In many fluid science experiments fluid interface effects play an important role (for instance, wetting and coalescence prevention, behaviour of drops and bubbles in non-isothermal conditions). In addition, in a space laboratory the residual acceleration is several orders of magnitudes smaller than gravity on Earth (10^-4-10^-6 g_o) and, in many cases, surface tension gradients (Marangoni effect) become the only driving force during fluids and material science processes.

So far, these problems have been addressed considering fixed, undeformable free boundaries. In this work, free surface flows are investigated with a mathematical model based on the Volume of Fluid (VOF) technique.