regarding thermal analysis in a bulb of type halogen
 

hi cfd user,
: a help regarding thermal analysis in a bulb. A bulb type halogen which power is 70w,produce 90 percentage of heat where filament gets heated upto 4000c but on the bulb surface temperature noted 400c in experimentally,but in cfd how is it possible. As area is small between the filament and glass surface the heat transfer takes quickly and getting high temp on bulb surface