I am working on a project involving this setup (please refer to the pic). Basically compressed air at a constant flow rate flows through a 1/4" tube to the tube shown and gets heated by the star-wound heater and, this hot air heats the small inner vessel and then leaves the system. Now I am stuck with doing a heat transfer estimation of the system. I know the ratings of my heater. The temp of the air should reach at least 300C. But I want to estimate whether the heater is capable of heating the air to 300C. Also, the heat transfer between the inner vessel (containing powdered material) and the hot air. This looks like a transient problem but I want to make a simple approximation to check whether the system is capable of generating heat and effective heat transfer is taking place. Need some expert help here to initiate the approximation. thanks in advance.