Open AccessComparative investigation of phase change material on heat transfer characteristics under theoretical and practical periodic temperature boundary
Author(s) -
Yong Wang,
Zhang Zhong-sheng,
Ting Liu,
Yunsheng Fan,
Jingmin Dai
Publication year - 2022
Publication title -
thermal science/thermal science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.339
H-Index - 43
eISSN - 2334-7163
pISSN - 0354-9836
DOI - 10.2298/tsci210825351w
Subject(s) - boundary (topology) , heat transfer , materials science , thermodynamics , boundary value problem , periodic boundary conditions , film temperature , mechanics , container (type theory) , phase (matter) , phase boundary , physics , mathematics , mathematical analysis , composite material , nusselt number , reynolds number , turbulence , quantum mechanics
In this paper, heat transfer characteristics of phase change material in rectangular containers are numerically analyzed. The inclination angles of the container refer to 0?, 90?, and 180?. Both theoretical and practical periodic temperature boundary conditions are taken into consideration, in which the periodic temperature boundary conditions include 50-80?C and 65-80?C. The comparison study is carried out through the liquid fraction and temperature histories during the heat transfer process under these different boundary conditions. It is indicated that there are large differences between the calculated results under the theoretical and the practical periodic temperature boundary conditions when the temperature boundary is 50-80?C, while the theoretical and the practical periodic temperature boundary conditions of 65-80?C have relatively little effect on the numerical results of the heat transfer process of the phase change material. Furthermore, compared with the temperature increasing stage, the numerical results calculated under the theoretical and the practical boundary conditions have more significant differences in the temperature decreasing stage. The research conclusion of this paper can provide a theoretical basis for the application of PCM under periodic temperature boundary conditions.