During melting of an inorganic salt in a container, conduction is the dominant mode of HT initially. After some time, the convection will be the dominant mode of HT. How can we quantify both the heat transfer during heating a material from room temperature to a certain temperature well above its melting point?
I remember a battery heat soak device which avoided solving this (difficult) problem by using carbon-fiber brush in container with melting paraffin. such device thermal transfer is always dominated by brush fibers conductivity.
If you have unstable or difficult to characterize thermal resistance, from engineering perspective it is suitable to short unstable thermal circuit with high thermal conductivity of carbon fiber. Because you can calculate carbon fiber thermal resistance more easily.
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