Steady State Heat transfer

How to provide heat transfer between two blocks seperated by some gap .... 

I have tried TCID and KOHTC entries in PCONTHT Property. 

My main concern is to find out heat transfer amount between gap (between two blocks ) .... Should not use mesh or gap elements in that gap .... 

Finally I got some results ... Same way I have tried with various gaps but results are not changed with respect to various gaps. 

 

Also How to check the heat out (power) from the blocks . I have not mentioned applied power.