Actas de congresos
Assessment of numerical techniques for micro-drop fluid mechanics
Fecha
2014-09-23Registro en:
Congreso sobre Métodos Numéricos y sus Aplicaciones, 21, 2014, Bariloche.
Autor
Ausas, Roberto Federico
Damian, Santiago Marquez
Montefuscolo, Felipe
Buscaglia, Gustavo Carlos
Institución
Resumen
Are currently available CFD techniques able to model the motion of a submilimiter-scale
liquid drop falling in another (quiescent) liquid? In this work we define a very simple two-dimensional
test: An initially circular drop of water of diameter 0.1 mm is placed at the center of a square box (size
0.6 mm) filled with oil (relative density 0.8). The goal is to compute the fall of the drop towards the
bottom of the box, which would take several seconds based on typical terminal velocities found in the
problem. It seems easy, doesn’t it? We have tested several CFD techniques on this problem: FOAM (two
available VOF-based methods within FOAM’s platform), GERRIS (free software from Popinet’s group),
level-set finite elements (interface capturing) and finally ALE finite elements (interface tracking). The
aim is to illustrate on the serious limitations this methodologies have to accurately and efficiently track
the dropet’s trajectory