Convergence problem with Find

Hello folks,

I have here a worksheet (MC15 on a 64 bit Win 7 machine) in which I tried to achieve by a solve block what I have done with an iteration. It is a plain heat transfer problem for which I try to compute the gas temperature in a confined volume.

Problem is that the Find function works like a charm but delivers a wrong answer; the solver finds a linear temperature increase wheas my iteration shows a saturation effect. I suspect that I have stated the conditions wrong.

Does anybody have the time at hands to check what's wrong?

Thank's

Raiko

Sorry, but it's in German.