The radius increases for a pipe where a viscous non-ideal fluid flows. What happens to the flow velocity?

Q=Av

says that the flow velocity should decrease.

I assume this equation cannot be used because it is non-ideal fluid?

I assume this equation cannot be used because it is non-ideal fluid?

v= r^2 x (P1-P2)/ ((viscosity constant)(pipe length))

says that flow velocity should increase.

I assume this equation will be used because it is a viscous fluid?

I assume this equation will be used because it is a viscous fluid?

So, which is the case?

I would assume that an INCREASE in radius would cause the flow velocity to INCREASE, according to the second equation.

I just wanted to confirm with the board.