Temperature Profile Within the Preform

As mentioned above both exterior and interior heating sources are methods for creating a temperature gradient within a preform. If the preform is heated with an exterior heating source, the temperature profile within the preform could be treated as a linear distribution according to the Fourier law of heat transfer in Section 2.3. If the preform is heated by itself (as in Section 5.4.2 3), however, the situation of interior heating source is much more complex. 

both the electric conductivity and thermal conductivity remain constant 

the outer surface temperature of the cylinder is maintained at constant 

In steady conditions, the following relation can be established according to the energy balance [12]  

Here q can be treated as a constant then the following expression can be obtained  

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Figure 5.21. Temperature profile within the preform for F-C VI process [38]...

C VD - An Integrated Engineering Design Approach 5.4.3 Temperature Profile Within the Preform... 

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