NUMERICAL SIMULATION OF NATURAL CONVECTION MELTING IN 2D AND 3D ENCLOSURES

Year 2019, Volume: 5 Issue: 1, 51 - 61, 03.10.2018

Nadezhda Bondareva Bondareva

https://doi.org/10.18186/thermal.513015

Cited By: 9

Abstract

Natural convection melting in 2D and 3D enclosures with a local
heater is studied numerically. The present research is related to a development
of effective cooling system for the electronic devices using the phase change
material that is essentially important nowadays. The domain of interest
includes vertical cold walls, adiabatic horizontal walls and a discrete heater
of constant high temperature located on the bottom adiabatic wall. The cavity
is filled with a phase change material (PCM) in solid state at the beginning of
the process. During the heating from the heat source PCM is melting. Numerical
solution of the present problem has been conducted using the dimensionless
transformed variables such as stream function and vorticity for 2D cavity and
vector potential functions and vorticity vector for 3D cavity with appropriate
initial and boundary conditions. The developed numerical technique has been
verified comprehensively. Obtained results have shown a potential of the used
methods for 2D and 3D problems. It has been found that, melting process is more
intensive in 3D case and the heat transfer rate at the heater is greater for 2D
in comparison with 3D data.

Keywords

Natural Convection, Melting, Numerical Analysis, Square and Cubical Cavities

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