you want to see how the plastic comes out of the print head? not possible in solidworks flow simulation. you'll have to go to something like abaqus.
solidworks flow simulation would help you understand how it flows inside the print head. you'd probably need non newtonian material properties to get it to work right.
if you know how things will behave if you understand how the heat is distributed in the printer head, this is definitely possible. but you need to have that understanding first.