Heat Transfer (cont.)
- The actual process is more complicated than our analysis. First, the temperature will not increase once the solid reaches the melting temperature unless the solid melts into liquid form. Therefore, the actual heat transfer process will probably slower than the estimation.
- If the outer layer melts then we have double convective conditions: convection from the plasma gas to the liquid alumina and then from there to the inner solid.
- To make matter even more complicated, the interface between the melt alumina and the solid is continuously moving inward.
- No analytical solutions or numerical analysis is necessary.
Total heat transfer during this period: Q=Qmax(Q/Qmax)=31438(0.48)=15090(J)