Learning Forum

[shadowfax7]

When injecting inert particles in a steady-state simulation, does it make sense to run a flow-only simulation first until it converges, then injection particles in an already converged flow? Or is this unnecessary and you can just inject particles from the start of the steady simulation? This would be without interaction. 

[Rob]

It's common practice for one way coupling (ie not interacting) to run the model then post process the particles after the solver has converged. Have a look at the tutorials in Help. 

[shadowfax7]

Thanks for your response. Indeed, I run the model before post-processing, but I was wondering, during running of the model, whether you for example let the residuals drop around three orders of magnitude and then inject the particles or just inject them from the beginning.

[Rob]

It they're uncoupled then particles won't update during the run. The update is only when you display. With coupled (interacting) particles the default update is every 10 iterations for steady flows.