Numerical solutions for mixed controlled solidification of phase change materials

authors	Vitorino, N; Abrantes, JCC; Frade, JR
nationality	International
journal	INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
author keywords	Phase change materials; Heat storage; Mixed control; Numerical method; Moving boundaries
keywords	THERMAL-ENERGY STORAGE; STEFAN PROBLEM; 2 DIMENSIONS
abstract	Kinetics of solidification of phase change materials (PCM) was analyzed for combined heat conduction in the PCM and container wall, and convection in the cold fluid. Stable and convergent numerical methods were derived after transformation to normalized size scale, and corresponding immobilization of the moving boundary. The accuracy was confirmed by comparing numerical solutions and corresponding analytical solutions for control by heat conduction in solidifying layers. The proposed method was used to assess when solidification is controlled solely by conduction in solidified layer, and to analyze relative roles of conduction through the container and convection in the cold fluid. (C) 2010 Elsevier Ltd. All rights reserved.
publisher	PERGAMON-ELSEVIER SCIENCE LTD
issn	0017-9310
year published	2010
volume	53
issue	23-24
beginning page	5335
ending page	5342
digital object identifier (doi)	10.1016/j.ijheatmasstransfer.2010.07.023
web of science category	Thermodynamics; Engineering, Mechanical; Mechanics
subject category	Thermodynamics; Engineering; Mechanics
unique article identifier	WOS:000282155900032