Learning Forum

[Zwernjayden]

What is the difference? And which should I use for a traditional rocket injector

[Rob]

One adds the particles from the surface facets and you define the releases diameter(s) the other uses a built in model to determine diameter distribution. They're all explained in the User's Guide under DPM Injections (Initial conditions). 

As rockets have many "best" designs I can't really comment on that. You know what you're modelling, so what best suits your application? 

[Zwernjayden]

I'm going to assume plain oriface then because I am more concerned about uniform mixing and combustion. If my fuel and oxidizer are both injected using dpm, do I need a traditional pressure or mass flow inlet? Or does the injection take its place?

[Rob]

The injection will add the material. You'll just need to evaporate the droplets to have combustion so initial conditions will need selecting with more care.