每年出版 12 期
ISSN 打印: 1044-5110
ISSN 在线: 1936-2684
Indexed in
A FEM SOLVER COUPLED TO A MULTILEVEL VOF METHOD FOR SIMULATION OF AXISYMMETRIC JETS AND TO A FRONT-TRACKING METHOD FOR SIMULATION OF SPREADING DROPLETS
摘要
In this work we review a few studies on the performance of the finite element approach in direct numerical simulations of liquid jet injection and droplet impact on dry surfaces. We consider the single-fluid formulation of the incompressible Navier-Stokes equations, discretize these equations on a fixed grid with the finite element method, and solve the resulting algebraic system with a multigrid technique. The finite element method allows a variational formulation of the capillary force that is implemented both with a volumetric approach and by using the Laplace-Beltrami operator. In order to study the injection of a liquid jet in a gas environment at low Reynolds numbers, we have implemented a multilevel volume of fluid (VOF) method because it can deal with strong topology changes in an automatic way. We have also considered a front-tracking algorithm to study the spreading of a droplet on a dry solid surface, because there is the need of a very precise positioning of the contact point, while there is no breaking or topology change. The results of several numerical experiments are presented and discussed for both cases.
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Cerroni D., Fancellu L., Manservisi S., Menghini F., Fluid structure interaction solver coupled with volume of fluid method for two-phase flow simulations, 1738, 2016. Crossref
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Cerroni Daniele, Da Vià Roberto, Manservisi Sandro, A projection method for coupling two-phase VOF and fluid structure interaction simulations, Journal of Computational Physics, 354, 2018. Crossref