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An incompressible smoothed particle hydrodynamics method for the motion of rigid bodies in fluids

Tofighi, Nima and Özbulut, Murat and Rahmat, Amin and Feng, James J. and Yıldız, Mehmet (2015) An incompressible smoothed particle hydrodynamics method for the motion of rigid bodies in fluids. Journal of Computational Physics, 297 . pp. 207-220. ISSN 0021-9991 (Print) 1090-2716 (Online)

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Official URL: http://dx.doi.org/10.1016/j.jcp.2015.05.015

Abstract

A two-dimensional incompressible smoothed particle hydrodynamics scheme is presented for simulation of rigid bodies moving through Newtonian fluids. The scheme relies on combined usage of the rigidity constraints and the viscous penalty method to simulate rigid body motion. Different viscosity ratios and interpolation schemes are tested by simulating a rigid disc descending in quiescent medium. A viscosity ratio of 100 coupled with weighted harmonic averaging scheme has been found to provide satisfactory results. The performance of the resulting scheme is systematically tested for cases with linear motion, rotational motion and their combination. The test cases include sedimentation of a single and a pair of circular discs, sedimentation of an elliptic disc and migration and rotation of a circular disc in linear shear flow. Comparison with previous results at various Reynolds numbers indicates that the proposed method captures the motion of rigid bodies driven by flow or external body forces accurately.

Item Type:Article
Uncontrolled Keywords:Smoothed particle hydrodynamics; Fluid-particle interaction; Sedimentation; Fictitious domain; Viscous penalty
Subjects:UNSPECIFIED
ID Code:28530
Deposited By:Mehmet Yıldız
Deposited On:23 Dec 2015 15:14
Last Modified:23 Dec 2015 15:14

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