Dynamic Simulation using Geant4

I am trying to create a simulation of Water flow through pipes using the Geant4 library. Can anyone help with this? I am not sure how to create dynamic simulations in Geant4.

I’m afraid this isn’t something Geant4 is designed or intended for. If I understand the requirement correctly, this sounds more like a computational fluid dynamics problem, which a separate domain and for which many other libraries/programs exist.