Thermal conduction is the transport of energy in a medium due to a temperature gradient and the physical mechanism is that of random atomic or molecular activity.The quantity of heat flow through the cross section of a solid body over time 't' in a steady state is governed by the Fourier`s law of heat conduction.
Heat conduction through single material sphere is given by
Where the symbols carry their usual meanings
radial conduction unit
It consist of-
1. Insulating housing with disc and lid
-The heater is fixed in the center of the bress disc.
-There is Cu pipe around the disc through which cooling water flows.
-From above,6 temperature measuring points are fitted.
-These points stretches radially from the center to the periphery.
The control and dispaly unit has a digital temperature and power dispaly