  This work presented a block triple-relaxation-time (B-TriRT) lattice
Boltzmann model for simulating melting in a rectangular cavity heated from
below at high Rayleigh (Ra) number (Ra = 108). The test of benchmark problem
shows that present B-TriRT can dramatically reduce the numerical diffusion
across the phase interface. In addition, the influences of the location of the
heated region are investigated. The results indicate that the location of
heated region plays an essential role in melting rate and the full melting
occur earliest when the heated region is located in the middle region.
