Effects of mushy-zone parameter on simulating melting and solidification phenomena inside a spherical capsule

The research on latent heat storage technology is beneficial for the large-scale popularization and application of energy technology. In order to solve difficulties in thermal (LTES) technology, numerical studies solid–liquid phase-change process LTES units using enthalpy-porosity method have become hotspots. Among them, importance studying mushy-zone parameter has been neglected. this paper, a two-dimensional model created based investigate effects different parameters within wide range [104–108 kg/(m3·s)] melting solidification processes spherical phase change material capsule. A comprehensive examination fluid flow transfer characteristics during two conducted. Meanwhile, morphology boundary evolution mushy zone under are discussed detail. It worth mentioning that new analytical perspective innovated by proposing “eccentricity phenomenon,” eccentricity law further explored. results show influence mechanisms differ greatly. This paper emphasizes significance exploring provides adequate guidance future simulation determine parameter.