Heat flux boundary condition for 2D model
 

Hi, i am simulating a flow boiling in micro pin-fin channel with heat comes from bellow. i have done this in 3D, but it took a long simulation times, now i try to make 2D models, but i have trouble where i put heatflux boundary condition in 2D model while maintaining pin fin array phisically in simulation. i couldn't put the heat flux in the plane as it defined as fluid. does anyone now how to put the heat flux correctly?