INVESTIGADORES
NIGRO Norberto Marcelo
congresos y reuniones científicas
Título:
Bag mode breakup simulations of a single liquid droplet.
Autor/es:
PAIRETTI CESAR; POPINET STEPHANE; MARQUEZ DAMIAN, SANTIAGO; NIGRO NORBERTO; ZALESKI STEPHANE
Lugar:
Glasgow
Reunión:
Congreso; ECCM-ECFD 2018; 2019
Institución organizadora:
ECCOMAS
Resumen:
Aerodynamic breakup (aerobreakup) consist on the decomposition of liquidbulks into smaller droplets due to the effect of a gas stream. Depending on the flowparameters, a liquid drop affected by a gas stream can evolve in several aerobreakupmodes [1, 2]. In particular, bag mode breakup takes place at moderate to low gas Webernumbers. During this process, the drops deforms into a film with a bag shape. As thebag radius increases, the film thickness decreases until a hole forms and expands, burstingthe bag into a spray. This mechanism is present in several breakup scenarios and it is ofgreat interest to understand the underlying physics of liquid atomization.In this work, we present numerical simulations of a single droplet submerged in astream with sets of parameters corresponding to bag mode breakup regime. We solveNavier-Stokes equations for the two-phase flow using a Volume of Fluid (VOF) methodwith a Piecewise Linear Interface Capturing (PLIC) and geometrical advection schemeson the volume fraction and momentum equations. We also apply Adaptive Mesh Re-finement (AMR) to reduce the computational cost, using high mesh resolution only inthe region of interest. These tools are programmed in the Basilisk open-source suite(http://basilisk.fr/)[3]. The deformation of the drop into a film and the posterior evolu-tion of its thickness is studied until the formation of a hole.