Comparative Numerical Analysis of Single Spheres Motion Into Two Fluids

Marcela Cruchaga, Rainald Löhner, Diego Celentano


In this work we present the modeling of single rigid spheres falling into viscous fluids considering the air-liquid interface. The physical model consists of a sphere falling down a tube partially filled with a liquid. Spheres of silicone and glass are used falling into different liquids: oil and water. The computations are performed using two different approaches previously developed in the framework of the finite element method: a fractional step formulation with adaptive mesh and time step sizes and a monolithic fixed mesh technique. The aim of the present analysis is to compare the numerical results predicted by different numerical formulations and to validate their responses with experimental data.

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