Simulation of effect of heated resistance on temperature distribution in laminar flow

I'm new to Comsol and I'm trying to simulate the effect of a metal heater resistance (gold) on a laminar cooling flow (water). I would like to get the stationary temperature distribution in the fluid due to the heating effect of the gold resistance. I'm probably missing some boundary condition since I cannot get my solution to converge.

What I have so far:

- Non-Isothermal Flow, which is a coupling between a laminar flow and heat transfer in fluids.
- inlet boundary condition (flow rate)
- outlet boundary condition (pressure)
- fluid temperature initial condition : room temperature (298.15 K)
- boundary temperature condition for gold resistance (310 K)
- convective heat flux defined with heat transfer coefficient

I attached a screen-shot of the model builder and of my geometry. Does anyone know which boundary conditions may be missing or otherwise why my solution isn't converging?

Thanks!