Abstract
The bridging time and freezing phenomena of phase change material (PCM) around two horizontal tubes arranged in a vertical series were studied numerically. Water was used as the PCM. The aim of this study was to investigate an estimated bridging time of the solidification process. Bridging time was calculated by numerical method. To confirm the validity of the present numerical calculations, it was compared with results conducted by other researchers. As the first step toward the aim, the freezing phenomena and bridging time were investigated in detail and then approximated by quadratic functions with a non-dimensional distance between the two tube centers.
