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Technical Brief

ASSESSMENT OF BASIC APPROACHES TO NUMERICAL MODELING OF PHASE CHANGE PROBLEMS - ACCURACY, EFFICIENCY AND PARALLEL DECOMPOSITION

[+] Author and Article Information
Tomas Mauder

Brno University of Technology Brno, Czech Republic, 616 00
mauder@fme.vutbr.cz

Pavel Charvat

Brno University of Technology Brno, Czech Republic, 616 00
charvat@fme.vutbr.cz

Josef Stetina

Brno University of Technology Brno, Czech Republic, 616 00
stetina@fme.vutbr.cz

Lubomir Klimes

Brno University of Technology Brno, Czech Republic, 616 00
klimes@fme.vutbr.cz

1Corresponding author.

ASME doi:10.1115/1.4036081 History: Received June 27, 2016; Revised January 27, 2017

Abstract

The fast and accurate modelling of phase change is of a significant importance in many processes from steel casting to latent heat thermal energy storage. The paper presents a numerical case study on the transient 3D heat diffusion problem with phase change. Three different approaches to modelling of solid-liquid phase change in combination with four commonly used numerical schemes are compared for their efficiency, accuracy, applicability, simplicity of implementation and robustness. The possibility of parallel decomposition of the approaches is also discussed. The results indicate that the best accuracy was achieved with the second order implicit methods and the best efficiency was reached with the simple explicit methods.

Copyright (c) 2017 by ASME
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