Fluid Flow through a Loop Reactor

Hello everyone,

I just started using Comsol for a few weeks.
Currently, I am trying to simulate fluid flow through a Loop Reactor that I designed in inventor.
Then, since I imported it to Comsol, I used cap faces to build the mesh for the volume. However, I want to define some conditions inside the reactor, basically I want to increase the velocity inside the loop (for example, using a pump) having low flow rates for inlet and outlet.

Is it possible to create another condition to change the velocity instead of only inlet and outlet?

Thank you for your help