A large range of corrections, limits and factors allow the user to fine tune the particle's behaviour for a variety of use cases. A variety of boundary, turbulence, position correction and viscosity models allow for SPH to be used for simulations in a wide range of contexts. The properties and behaviour of the smoothed particles can be defined by density, size, viscosity and speed of sound in medium. While SPH simulations need to perform computations for a higher number of neighbouring particles, the calculations can be run on multi-GPU with minimal effort using Rocky's simulation execution target settings. It is also typically considered difficult to set inlet conditions in SPH, however this Rocky module seamlessly integrates with pre-existing Rocky volume fills and continuous inlets to simplify the process. Rocky allows the user to mix the required amount of solid and liquid particles to accurately simulate their interactions.
The benefit of SPH simulations in Rocky DEM software is that it allows for particle - SPH interactions which is ideal for simulating slurry materials which can’t precisely be modelled purely as a fluid or with purely solid particles. The integrated Rocky SPH module shines in multiphase flows with a high solid density and free surface flows.
SPH is also a mesh-free method and thus the fluid flow does not need to be meshed into cells before a simulation. A Lagrangian method originally developed for astrophysics simulations, SPH is a powerful tool in modelling fluid flows with high viscosity, high deformation and free surface flows. SPH is a computational technique that uses a collection of discrete particles to simulate specific solid mechanics and fluid flows. The release of Rocky DEM 2022R1 has introduced a beta version of Smoothed particle hydrodynamics (SPH) that helps further the breadth of simulations made possible in Rocky DEM.
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