Velocity & Pressure is necessary to push material during Injection process (before V/P switch over).
How do we consider this pressure in simulation? There is no “Pressure vs ram position” option in the simulation.
Your thesis isn´t correct, if I understood you right.
In the filling stage of the injection molding process only the velocity is necessary. The pressure is a result of the pressure loses in the runner systems and the part.
So the pressure is a result of your flow rate. The only thing you can do is to install a pressure limit. If you do this and the pressure limit is reached and the flow rate will be reduced.
To define a pressure limit in the calculation you can reduce the maximum injection pressure of your machine in the advanced options. This will have the same effect.