SPH and MPS methods

Smoothed Particle Hydrodynamics and Moving Particle Simulation

Smoothed Particle Hydrodynamics (SPH) and Moving Particle Semi-implicit (MPS) are two particle methods used in fluid dynamics simulation.

SPH is a method used for simulating the mechanics of continuum media. It is a meshfree Lagrangian method, and the resolution of the method can easily be adjusted. This method is used in various fields, like astrophysics, ballistics, volcanology, and oceanography.

On the other hand, MPS is also a meshfree particle method. It was developed to simulate free-surface flows. The method is based on the idea of replacing the pressure terms in the Navier-Stokes equations with a semi-implicit form, which allows for larger time steps and therefore more efficient computation.

Each method has its own strengths and weaknesses, and the choice of which to use depends on the specific requirements of the simulation.

In more detail, SPH's strength lies in its ability to handle a more physical phenomena, thanks to its comprimibility assumption. However, it can be computationally intensive, which might be a drawback for simulations requiring high efficiency. Moreover, the stability condition when multiphysics is enabled could be more troublesome than SPH.

MPS is highly efficient in computational terms. The incomprimibility assumtption (given the semi-implicit solution of pressure in the Navier-Stokes equations) allows for larger time steps, which in turn leads to faster simulations.

In conclusion, the choice between SPH and MPS methods for fluid dynamics simulation should be dictated by the specific requirements of the physics of the system. Notably, most of the the sectors where free surface flow is predominant have low velocities field, i.e. low Mach numbers and incompressible fluid.

Thus, when simulating bearings lubrication, gearbox splashing and cooling, oil jets in e-motors and mixing of highly viscous fluids, Moving Particle Simulation is preferred than Smoothed Particle Simulation for faster, simpler and more stable results.

Smoothed Particle Simulation and Moving Particle Simulation
Differences between Smoothed Particle Simulation and Moving Particle Simulation. Assumptions on comprimibility and simulation time steps are the most critical differences, while both are mesh-less particle simulations. Moving Particle Simulation can have slightly faster simulation times, for a less demanding stability condition.

What is the difference between Smoothed Particle Hydrodynamics and Moving Particle Simulation?

Difference between Smoothed Particle Hydrodynamics and Moving Particle Simulation: SPH excels in simulating continuum mechanics with adjustable resolution for diverse phenomena, while MPS is favored for efficient free-surface flow simulation with larger time steps for speed.

What are the advantages of Particleworks with respect to other particle simulation software?

Advantages of Particleworks over other particle simulation software: Particleworks stands out for its efficiency, simplicity, and stability, particularly in applications like lubrication, splashing, cooling, and mixing of viscous fluids, offering faster and more reliable results.