Fast-forwarding a particle system

Is there a way to fast-forward a particle system? I have a project with a number of particle systems emulating material flow through various pipes and ducts, and I’d like those systems to be well in-progress when the app starts, rather than seeing them start and flow. It seems like you could use ParticleEmitter::Update(FrameInfo), but that method seems to be internal and is not exposed to script. What is the best way to do this that is accessible via Lua?