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Experimental and numerical analysis of a sphere falling into a viscous fluid
Author(s) -
Cruchaga Marcela,
Löhner Rainald,
Celentano Diego
Publication year - 2011
Publication title -
international journal for numerical methods in fluids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 112
eISSN - 1097-0363
pISSN - 0271-2091
DOI - 10.1002/fld.2648
Subject(s) - falling (accident) , spheres , polygon mesh , finite element method , numerical analysis , mechanics , computer simulation , set (abstract data type) , mathematics , computer science , geometry , physics , mathematical analysis , engineering , structural engineering , medicine , environmental health , astronomy , programming language
SUMMARY The experimental and numerical analysis of spheres falling into viscous flows is considered. The physical model is built using a set of silicone and glass spheres falling into oil and water. The rigid‐body trajectory of the sphere and the free surface evolution are obtained from videos. The numerical results are obtained using two different finite element codes. The first code uses a fractional step approach with adaptive meshes and time‐step sizes whereas the second code uses a monolithic fully coupled fixed‐mesh technique. The results exhibit a good comparison between both numerical techniques and with the experiments. Copyright © 2011 John Wiley & Sons, Ltd.