Modelling of EM glass convection
ISSN: 0332-1649
Article publication date: 7 March 2008
Abstract
Purpose
To develop the mathematical model, which allows predicting the temperature and flow distribution of an opaque glass melt with the temperature‐dependent properties in case it is generated by electromagnetic and thermal convection. Analysis has been done for geometry of the model crucible with the immersed rod electrodes. Numerical analysis is used as a tool for finding out the parameters of the system, which allow getting desiderated homogeneity of temperature field by EM action.
Design/methodology/approach
ANSYS CFX software is implemented for coupling of EM, thermal and HD processes in the modelled system. Usability of non‐inductive approximation is shown using a full harmonic analysis in ANSYS.
Findings
External magnetic field can impact the temperature distribution in the whole volume of the melt significantly, it relocates the hottest zones and changes the maximal temperature in the melt. Qualitative agreement between the numerical and experimental results has been obtained. Dependence of the potential difference between the electrodes on the velocity and temperature range has been examined. Impact of different thermal boundary conditions has been analysed.
Research limitations/implications
Effects analysed in the publication occur in each conducting media subjected to the impact of simultaneous electrical and magnetical field. The main limitation is non‐transparency of the melt.
Practical implications
The purpose is to develop a mathematical tool for parameter optimisation of real glass melting furnace.
Originality/value
In the present model temperature dependent properties of the melt have been taken into account, which has been neglected in previous models.
Keywords
Citation
Cepīte, D., Jakovičs, A., Halbedel, B. and Krieger, U. (2008), "Modelling of EM glass convection", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 27 No. 2, pp. 387-398. https://doi.org/10.1108/03321640810847670
Publisher
:Emerald Group Publishing Limited
Copyright © 2008, Emerald Group Publishing Limited