This paper presents a conduction based model for solving the phase cha
nge heat transfer problem around a vertical cylinder submersed in the
phase change medium. The energy equation is coupled to the how problem
by an energy balance. The system of equations is solved numerically b
y using the average control volume technique and the ADI approach. The
results show the effects of the variation of the Blot number, Stefan
number, the inlet fluid temperature and the ratio of the outer to the
inner tube radius on the solidified mass fraction, NTU, effectiveness
and the time for complete solidification. (C) 1997 by John Wiley & Son
s, Ltd.