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1,1

Smoothed particle hydrodynamics simulation of confined viscous flows

doi: 10.6062/jcis.2013.04.02.0073

(Free PDF)

Authors

J.G. Coelho, T.F. Oliveira, A.C.P. Brasil Junior and P. Maruzewski-Gaud

Abstract

In this work the Smoothed Particle Hydrodynamics methodology (SPH) is used to simulate incompressible and confined viscous flows of Newtonian fluids. The SPH is a meshfree Lagrangian method which simulates the flow using moving fluid particles that interact one with others by hydrodynamics forces. The forces acting on each particle are evaluated using a spatial filtering process, taken over a certain region in the neighbourhood of the particle which is defined by a smoothing length, h. The filter kernel function and the ratio of the mean spatial displacement of the particles, and the smoothing length, h, are both of central importance for the accuracy of this methodology. A study of the relative importance of this parameters and also of the boundary condition scheme and pressure constitutive model are performed in a context of low Reynolds number flows. The model is validated by comparison with analytical solution of the Stokes equations. Additionally, the cases Re = 1 and Re = 100 are simulated. Good agreement of the results of the simulations and the reference theoretical data was observed.

Keywords

Smoothed particle hydrodynamics, meshfree methods, low Reynolds number flow.

References

[1] MONAGHAN, JJ,1992, Smoothed Particle Hydrodynamics, Annual Review of Astronomy and Astrophysics 30:543-574

[2] MORRIS, JP, 2000, Simulating surface tension with smoothed particle hydrodynamics, International Journal for Numerical Methods in Fluids 33:333-353.

[3] MONAGHAN, JJ, 2002, SPH compressible turbulence, Royal Astronomical Society 335:843-852.

[4] HU XY, ADAMS NA., 2007, An incoompressible multi-phase SPH method, Journal of Computational Physics 227:264-278.

[5] LIU, GR, LIU, MB, 2003, Smoothed Particle Hydrodynamics, Ed. World Scientif Publishing, Singapore, China.

[6] SHAO, S., LO EDMOND, YM, 2003, Incompressible SPH method for simulating Newtonian and non-Newtonian flows with a free surface, Advances in Water Resources 26:787 - 800.

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