Abstract
In the present study, the melting of phase change material (PCM) in a square enclosure with different wall heating conditions has been studied numerically. It has been found that at the early stage of melting, PCM melts faster in case of bottom wall heating. Melting for sidewall heating transcends the melting of bottom wall heating in a later stage. However, the increase of solid–liquid interface length leads to higher convective heat transfer for side wall heating in later part of melting. On the other hand, isothermal heating from the upper wall results in thermal stratification of PCM layers which leads to no convection. So, the melting time is quite large for this case.
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