Contact Model and GPU Device Compatibility

The Multi-Sphere solver can run on three different engines such as CPU, OpenCL, and CUDA.

The selection of the engine to be used will depend on the hardware as well as the settings in the simulation. The GPU engines (OpenCL and CUDA) can only be used when all models in a simulation are supported, otherwise if only some of the physics models are supported on the GPU then the entire simulation will run on the CPU. In order to understand which models take full advantage of the GPU engine, select the Solvers tab in the EDEM Physics Interaction section of the Creator.

Models	Name	CPU	OpenCL	CUDA
Base Models	Hertz-Mindlin (no slip)	●	●	●
	Hertz-Mindlin with JKR**	●	●	●
	Hertz-Mindlin with JKR V2	●	●	●
	Linear Spring	●	●	●
	Hysteretic Spring	●	●	●
	Edinburgh Elasto-Plastic Adhesion	●	●	●
	No Base Model	●	●	●
Rolling Friction Models	Standard Rolling Friction	●	●	●
	RVD Rolling Friction (Deprecated)	●	●	●
	Type C Rolling Friction	●		●
	No Rolling Friction Model	●	●	●
Additional Models	Bonding (Deprecated)	●
	Bonding V2	●	●	●
	Breakage	●	●	●
	Heat Conduction	●	●	●
	Linear Cohesion V2	●	●	●
	Tribocharging	●
	Electrostatics	●
	Relative Wear	●	●	●
	Archard Wear**	●	●	●
	Spray Coating	●	●	●
	Oka Wear	●	●	●
Particle Body Forces	Electrostatics	●
	Temperature Update	●	●	●
	Saffman Lift	●	●	●
	Magnus Lift	●	●	●
	Schiller and Naumann Drag	●	●	●
	Morsi and Alexander Drag	●	●	●
	Haider and Levenspiel Drag	●	●	●
	Ganser Drag	●	●	●

** An experimental equivalent of this model is available in Options > Additional Components > Enable Experimental Contact models.

If an API model is written with the GPU API (API code includes the relevant OpenCL/CUDA file) the status of the GPU Solver Mode will change from CPU Solver to GPU Solver. Contact Chaining for GPU API is supported however only 1 plug-in model is supported at the same time, if the API is a Base Contact Model no further in-built base contact model should be added to the simulation.

See the Simulator documentation for more information on the GPU Solver.

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