we live in different cities and we are only able to see each other on weekends and i missed her so much, sorry for my ignorance, im an application engineer and forgot about these long time ago

Thanks alot for your supports,

Tolga

This is the question : an alumina slab with lenght of 400 mm and diameter of 130 mm , and temperature of 520 Celcius.

Is put in a room with 20 Celcius temperature, if the overall heat transfer coefficient is 50W /m2K.

after 5,15,25 minutes;

a-) what is the centerline temperature if we assume heat transfer is 1D (unsteady state, cylinder is losing temperature)

b-) what is temperature of point A,B,C,D

c-) what is total heat loss of slab