Flight results on marangoni flow instability in liquid bridges

摘要

This paper reports on the results of the experiment PULSAR (Pulsating and Rotating Instabilities in Oscillatory Marangoni Flows), Performed on the MAXUS 3 Sounding Rocket launched last November from the Swedish base in Kiruna. Aim of the Experiment was the study of the oscillatory Marangoni convection in a cylindrical liquid Bridge of silicone oil with kinematic viscosity Of 5cSt. The experiment was motivated by Preliminary on-ground numerical simulations And microscale experimental studies, that Have pointed out that the oscillatory Marangoni instability appears at the Beginning in the form of a pulsating regime, Caused by a hydro-thermal standing wave, and Then it turns to a rotating regime, caused by a Traveling wave.