Unformatted text preview: hodology for 3D industrial
SPH modelling involves the CAD specification of die
geometry, the construction of FEM meshes using
comercial mesh generators and the conversion of this to
SPH input data.
The difficulty associated with
visualisation of complex 3D free surface flows using nonstructured particle data were also highlighted.
The two examples demonstrate the complex 3D flow
patterns in the die filling process. The complex free
surface behaviour include splashing and surface breakup
are handled naturally by SPH. This results from the
Lagrangian nature of SPH and the superior mass
conservation properties of this particle method.
This project is funded by the Cooperative Research Centre
for Alloy and Solidification Technology (CAST).
CLEARY, P.W. and HA, J., (1998), “SPH modelling of
isothermal high pressure die casting”, Proc. 13th
Australasian Fluid Mechanics Conference, Melbourne,
Australia, December 663-666.
CLEARY, P.W., HA, J. and AHUJA, V., (1999), “High
pressure die casting using smoothed particle
hydrodynamics”, Int. J. Cast Metal Res., in press.
CLEARY, P.W. and MONAGHAN, J.J., (1993),
“Boundary interactions and transition to turbulence for
standard CFD problems using SPH”,
International Computational Techniques and Applications
Conference, Eds. Stewart, D., Gardener, H., and
Singleton, D., Canberra ACT, pp. 157.
HA, J., CLEARY, P. and AHUJA, V., (1998),
“Comparison of SPH Simulation of High Speed Die
Filling with Experiment”, Proc. 13th Australasian Fluid
Mechanics Conference, Melbourne, Australia, December
HA, J. and CLEARY, P., (1999), Comparison of SPH
simulations of High Pressure Die Casting with the
experiments and VOF simulations of Schmid and Klein,
Int. J. Cast Metals Res., submitted.
HOCKNEY, R.W. and EASTWOOD, J.W., (1988),
“Computer Simulation Using Particles”, Institute of
Physics Publishing Ltd.
MONAGHAN, J.J., (1992), “Smoothed particle
hydrodynamics”, Ann. Rev. Astron. Astrophys., 30, 543574.
MONAGHAN, J.J., (1994), “Simulating free surface
flows with SPH”, J. Comp. Phys., 110, 399-406.
MONAGHAN, J.J., (1995), “Improved modelling of
boundaries”, SPH Technical Note #2, CSIRO Division of
Mathematics and Statistics, Technical Report DMS - C
95/86. Figure 6: Liquid metal surface when the die cavity is
partially filled using a rectangular grid for surface
visualisation. 440 Figure 2: Two perspective views of the filling of the C-shaped mould. The particles are coloured by velocity with red being
60 m/s and dark blue being stationary. Left: xy-plane. Right: xz-plane. 441 Figure 4: Two perspective views of the filling process at three times, as indicated. The particles are coloured by velocity
with red being 60 m/s and dark blue being stationary. 442...
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- Fall '13